0001193125-20-317000 | 20-F | XBRL Viewer

Diluted earnings per share

^[1]

$ 497,840

$ 479,446

$ 354,396

Basic earnings per share

$ 3.73

$ 3.49

$ 2.49

$ 3.71

$ 3.47

$ 2.47

[1]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.

Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands

12 Months Ended

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Statement of Comprehensive Income [Abstract]

Other comprehensive income (loss), net of tax

^[1]

$ 497,840

$ 479,446

$ 354,396

Net change in fair value of cash flow hedges

^[2]

14,891

30,553

(51,116)

Net change in fair value of available-for-sale securities

^[3]

(2)

1,592

(1,182)

Net actuarial (loss) gain on defined benefit plan

^[4]

(680)

(1,961)

777

14,209

30,184

(51,521)

$ 512,049

$ 509,630

$ 302,875

[1]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.
[2]	Net of tax (expense) benefit of $(2,371), $(2,458) and $4,482 for the fiscal years ended September 30, 2020, 2019 and 2018, respectively.
[3]	Net of immaterial amount of tax benefit for the fiscal years ended September 30, 2020, 2019 and 2018.
[4]	Net of tax (expense) benefit of $(11), $1,080 and $(254) for the fiscal years ended September 30, 2020, 2019 and 2018, respectively.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Balance, Shares at Sep. 30, 2017

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Tax (expense) benefit on change in fair value of cash flow hedges	$ (2,371)	$ (2,458)	$ 4,482
Tax (expense) benefit on unrealized (loss) gain on defined benefit plan	$ (11)	$ 1,080	$ (254)

Consolidated Statements of Changes in Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands

Total

Cumulative Effect Adjustment

^[3]

Ordinary Shares

Additional Paid-in Capital

Treasury Stock

Accumulated Other Comprehensive Income (Loss)

^[1]

Retained Earnings

Cumulative Effect Adjustment

^[3]

Total Amdocs Limited Shareholders' Equity

Cumulative Effect Adjustment

^[3]

Non-controlling Interests

^[2]

Balance at Sep. 30, 2017

$ 3,574,070

$ 4,410

$ 3,458,887

$ (4,365,124)

$ 18,790

$ 4,457,107

$ 3,574,070

144,391

Comprehensive income:

^[2]

354,396

(51,521)

Employee stock options exercised

302,875

81,286

$ 24

81,262

81,286

Employee stock options exercised, Shares

1,800

Repurchase of shares, Shares

(419,228)

(6,337)

Cash dividends declared

(137,602)

Issuance of restricted stock, net of forfeitures

$ 2

Issuance of restricted stock, net of forfeitures, Shares

323

Equity-based compensation expense related to employees

47,476

Changes in Noncontrolling interests

43,163

$ 43,163

Balance at Sep. 30, 2018

3,492,042

$ 4,436

3,587,625

(4,784,352)

(32,731)

4,673,901

3,448,879

43,163

Balance, Shares at Sep. 30, 2018

140,177

Comprehensive income:

^[2]

479,446

30,184

Employee stock options exercised

509,630

41,498

$ 11

41,487

41,498

Employee stock options exercised, Shares

874

Repurchase of shares, Shares

(398,057)

(6,656)

Cash dividends declared

(150,982)

Issuance of restricted stock, net of forfeitures

$ 5

Issuance of restricted stock, net of forfeitures, Shares

378

Equity-based compensation expense related to employees

38,550

Changes in Noncontrolling interests

(654)

Balance at Sep. 30, 2019

$ 3,542,466

$ 10,434

$ 4,452

3,667,662

(5,182,409)

(2,547)

5,012,799

$ 10,434

3,499,957

$ 10,434

42,509

Balance, Shares at Sep. 30, 2019

134,773

Comprehensive income:

^[2]

$ 497,840

497,840

14,209

Employee stock options exercised

512,049

$ 97,843

$ 24

97,819

97,843

Employee stock options exercised, Shares

1,871

Repurchase of shares, Shares

$ (360,912)

(360,912)

(5,668)

Cash dividends declared

$ (168,732)

(168,732)

Issuance of restricted stock, net of forfeitures

$ 7

Issuance of restricted stock, net of forfeitures, Shares

559

Equity-based compensation expense related to employees

42,434

Balance at Sep. 30, 2020

$ 3,665,155

$ 4,483

$ 3,807,915

$ (5,543,321)

$ 11,662

$ 5,341,907

$ 3,622,646

$ 42,509

Balance, Shares at Sep. 30, 2020

131,535

[1]	As of September 30, 2020, 2019 and 2018, accumulated other comprehensive income (loss) is comprised of unrealized gain (loss) on derivatives, net of tax, of $18,836, $3,945 and $(26,608), unrealized loss on short-term interest-bearing investments, net of tax, of $(2), $0 and $(1,592) and unrealized loss on defined benefit plan, net of tax, of $(7,172), $(6,492) and $(4,531).
[2]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.
[3]	The Cumulative effect adjustments as of October 1, 2018 include an increase of $14,294 to retained earnings due to the impact of adoptions of ASU No. 2014-09 (ASC 606) and decrease of $3,860 to retained earnings due to adoption of ASU No. 2016-16.

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Cash dividends declared per ordinary share		$ 1.2675	$ 1.105	$ 0.970
Unrealized gain (loss) on derivatives, net of tax		$ 18,836	$ 3,945	$ (26,608)
Unrealized loss on short-term interest-bearing investments, net of tax		(2)	0	(1,592)
Unrealized loss on defined benefit plan, net of tax		$ (7,172)	$ (6,492)	$ (4,531)
Accounting Standards Update 2014-09 [Member]
Increase in retained earnings	$ 14,294
Accounting Standards Update 2016-16 [Member]
Decrease in retained earnings	$ 3,860

Consolidated Statements of Cash Flows - USD ($)
$ in Thousands

12 Months Ended

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Cash Flow from Operating Activities:

Reconciliation of net income to net cash provided by operating activities:

^[1]

$ 497,840

$ 479,446

$ 354,396

Depreciation and amortization

198,409

205,772

211,224

Amortization of debt issuance cost

144

Equity-based compensation expense

42,434

38,550

47,476

Deferred income taxes

30,239

(13,950)

25,098

Loss from short-term interest-bearing investments

737

1,324

Net changes in operating assets and liabilities, net of amounts acquired:

Accounts receivable, net

134,584

6,589

(66,451)

Prepaid expenses and other current assets

(10,815)

25,907

(18,736)

Other noncurrent assets

(23,329)

(1,635)

9,674

Lease assets and liabilities, net

(7,881)

Accounts payable, accrued expenses and accrued personnel

(190,354)

(60,042)

25,348

Deferred revenue

(15,184)

(37,855)

7,650

Income taxes payable, net

(9,281)

6,025

(31,036)

Other noncurrent liabilities

11,330

6,833

(8,718)

Net cash provided by operating activities

658,136

656,377

557,249

Cash Flow from Investing Activities:

Purchase of property and equipment, net

^[2]

(205,510)

(128,086)

(231,146)

Proceeds from sale of short-term interest-bearing investments

101,287

303,090

Purchase of short-term interest-bearing investments

(753)

(76,037)

Net cash paid for business and intangible assets acquisitions

(249,358)

(60,572)

(355,142)

Other

(6,104)

615

(3,157)

Net cash used in investing activities

(461,725)

(86,756)

(362,392)

Cash Flow from Financing Activities:

Borrowings under financing arrangements

450,000

120,000

Payments under financing arrangements

(350,000)

(120,000)

Proceeds from issuance of debt, net

643,919

Proceeds from employee stock option exercises

(360,912)

(398,057)

(419,228)

97,850

41,483

81,280

Payments of dividends

(164,061)

(147,616)

(134,292)

Investment by noncontrolling interests, net

^[2]

(4,776)

47,013

Payment of contingent consideration from a business acquisition

(1,411)

(7,470)

Excess tax benefit from equity-based compensation and other

(240)

(336)

(458)

Net cash provided by (used in) financing activities

315,145

(516,772)

(425,685)

Net increase (decrease) in cash and cash equivalents

511,556

52,849

(230,828)

Cash and cash equivalents at beginning of year

471,632

418,783

649,611

Cash and cash equivalents at end of year

983,188

471,632

418,783

Cash paid for:

Income taxes, net of refunds

45,398

75,790

55,938

Interest

^[3]

$ 5,392

$ 7,348

$ 2,009

[1]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.
[2]	The amounts under “Purchase of property and equipment, net”, include proceeds from sale of property and equipment of $194, $151 and $459 for the year ended September 30, 2020, 2019 and 2018, respectively, and proceeds of $9,676 relating to refund of betterment levy for the year ended September 30, 2019 ($4,776 of which was a refund to the noncontrolling interest).
[3]	The amounts under “Interest” include payments of interest to financial institution, tax authorities and other.

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Proceeds from sale of property and equipment	$ 194	$ 151	$ 459
Proceeds Refund For Property Plant And Equipment		9,676
Proceeds Refund For Non Controlling Interest		$ 4,776

Nature of Entity	12 Months Ended
Nature of Entity	Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Entity	Note 1 — Nature of Entity Amdocs Limited (the “Company”) is a leading provider of software and services to communications, cable and satellite, entertainment and media industry service providers of all sizes throughout the world. The Company and its consolidated subsidiaries operate in one segment and design, develop, market, support, implement and operate its open and modular cloud offering. The Company is a Guernsey limited company, which directly or indirectly holds numerous subsidiaries around the world, the vast majority of which are wholly-owned. The majority of the Company’s customers are in North America, Europe, Asia-Pacific and the Latin America region. The Company’s main development facilities are locate d in Brazil, Canada, Cyprus, India, Ireland, Israel, Mexico, the Philippines, the United Kingdom and the United States.

Summary of Significant Accounting Policies

12 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 2 — Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP and are denominated in U.S. dollars.

Consolidation

The consolidated financial statements include the accounts of the Company and its subsidiaries, the vast majority of which are wholly-owned. All intercompany transactions and balances have been eliminated in consolidation.

In December 2017, the Company entered into agreements with Union Investments and Development Limited (“Union”) to partner through a legal entity that is equally owned by the Company and Union for the purpose of acquiring specific land which the Company expects to use as the site for a new campus in Ra’anana, Israel. On January 2, 2018 the Company completed the acquisition of the land. Pursuant to the agreements between the Company and Union, as the Company has control over the construction and ongoing operations of the new campus, the new entity’s financial information is consolidated into the Company’s consolidated financial statements with the portion not owned classified as

non-controlling

interests. The Company is obligated to distribute in the future the new entity’s earnings under certain conditions, in fiscal years 2020

2019

and 201

the new entity had negligible earnings or losses and, therefore, an immaterial effect on consolidated financial statements of Amdocs Limited.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements, and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Reclassifications

From time to time, certain immaterial amounts in prior year financial statements may be reclassified to conform to the current year presentation.

Functional Currency

The Company manages its foreign subsidiaries as integral direct components of its operations. The operations of the Company’s foreign subsidiaries provide the same type of services with the same type of expenditures throughout the Amdocs group. The Company has determined that its functional currency is the U.S. dollar. The Company periodically assesses the applicability of the U.S. dollar as the Company’s functional currency by reviewing the salient indicators as indicated in the authoritative guidance for foreign currency matters.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash and interest-bearing investments with insignificant interest rate risk and maturities from acquisition date of 90 days or less.

Accounts Receivable Factoring

From time to time, the Company uses

non-recourse

factoring arrangements, to sell accounts receivable to third-party financial institutions. The sale of the receivables in these arrangements are accounted for as a true sale.

Investments

The Company classifies all of its short-term interest-bearing investments as

available-for-sale

securities. Such short-term interest-bearing investments consist primarily of bank deposits, money market funds and corporate bonds, which are stated at market value. Unrealized gains and losses are comprised of the difference between market value and amortized costs of such securities and are reflected, net of tax, as “accumulated other comprehensive income (loss)” in equity, unless a security is other than temporarily impaired. The Company recognizes an impairment charge in earnings when a decline in the fair value of its investments below the cost basis is judged to be other-than-temporary. For securities with an unrealized loss that the Company intends to sell, or it is more likely than not that the Company will be required to sell before recovery of their amortized cost basis, the entire difference between amortized cost and fair value is recognized in earnings. For securities that do not meet these criteria, the amount of impairment recognized in earnings is limited to the amount related to credit losses, while other declines in fair value related to other factors are recognized in other comprehensive income (loss). The Company uses a discounted cash flow analysis to determine the portion of the impairment that relates to the credit losses. To the extent that the net present value of the projected cash flows is less than the amortized cost of the security, the difference is considered a credit loss. Realized gains and losses on short-term interest-bearing investments are included in earnings and are derived using the

first-in-first-out

(FIFO) method for determining the cost of securities.

Property and Equipment

Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful life of the asset, which primarily ranges from three to ten years. Leasehold improvements are amortized over the shorter of the estimated useful lives or the term of the related lease. Property and equipment that have been fully depreciated and are no longer in use are netted against accumulated depreciation.

The Company capitalizes certain expenditures for software that is internally developed for use in the business, which is classified as computer equipment. Amortization of internal use software begins when the software is ready for service and continues on the straight-line method over the estimated useful life.

Company capitalizes the expenditures related to the new campus in Israel, which are classified as building and land. Amortization will begin when the new campus is ready for use and will be amortized on the straight-line basis over the estimated useful life.

Leases

As discussed below under “

Adoption of New Accounting Standards”

, the Company adopted ASU

No. 2016-02,

“Leases”.

As a lessee, substantially all of the Company’s lease obligation is for office real estate. The significant judgments used in determining its lease obligation include whether a contract is or contains a lease and the determination of the discount rate used to calculate the lease liability. The Company’s leases may include the option to extend or terminate before the end of the contractual term and are often

non-cancelable

or cancelable only by the payment of penalties.

The lease assets and liabilities include these options in the lease term when it is reasonably certain that they will be exercised. In certain cases, the Company subleases excess office real estate to third-party tenants in immaterial amounts. Lease assets and liabilities recognized at the lease commencement date are determined predominantly as the present value of the payments due over the lease term. Unless the implicit rate can be determined, the Company uses its incremental borrowing rate on that date to calculate the present value. The incremental borrowing rate approximates the rate at which the Company could borrow, on a secured basis for a similar term, an amount equal to its lease payments in a similar economic environment.

Effective October 1, 2019, when the Company is the lessee, all leases are recognized as lease liabilities and associated lease assets on the Consolidated Balance Sheet. Lease liabilities represent the Company’s obligation to make payments arising from the lease. Lease assets represent the Company’s right to use an underlying asset for the lease term and may also include advance payments, initial direct costs or lease incentives. Fixed and variable payments that depend upon an index or rate, such as the Consumer Price Index (CPI), are included in the recognition of lease assets and liabilities at the commencement-date rate. Other variable payments, such as common area maintenance, property and other taxes, utilities and insurance that are based on the lessor’s cost, are recognized in the Consolidated Income Statement in the period incurred. Operating lease expense is recorded on a straight-line basis over the lease term.

Goodwill, Intangible Assets and Long-Lived Assets

Goodwill and intangible assets deemed to have indefinite lives are subject to an annual impairment test or more frequently if impairment indicators are present. Goodwill impairment is deemed to exist if the net book value of a reporting unit exceeds its estimated fair value. The goodwill impairment test involves a

two-step

process. The first step, identifying a potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step would need to be conducted; otherwise, no further steps are necessary as no potential impairment exists. The second step, measuring the impairment loss, compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. Any excess of the reporting unit goodwill carrying value over the respective implied fair value is recognized as an impairment loss.

The total purchase price of business acquisitions accounted for using the purchase method is allocated first to identifiable assets and liabilities based on estimated fair values. The excess of the purchase price over the fair value of net assets of purchased businesses is recorded as goodwill.

Other definite-life intangible assets consist primarily of core technology and customer relationships. Core technology acquired by the Company is amortized over its estimated useful life on a straight-line basis.

Some of the acquired customer relationships are amortized over their estimated useful lives in proportion to the economic benefits realized. This accounting policy generally results in accelerated amortization of such customer relationships as compared to the straight-line method. All other acquired customer relationships are amortized over their estimated useful lives on a straight-line basis.

The Company tests long-lived assets, including definite life intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Determination of recoverability of long-lived assets is based on an estimate of the undiscounted future cash flows resulting from the use of the cash generating unit and its eventual disposition. Measurement of an impairment loss for long-lived assets, including definite life intangible assets that management expects to hold and use is based on the fair value of the cash generating unit. Long-lived assets, including definite life intangible assets, to be disposed of are reported at the lower of carrying amount or fair value less costs to sell.

Comprehensive Income

Comprehensive income, net of related taxes where applicable, includes, in addition to net income:

(i) net change in fair value of

available-for-sale

securities;

(ii) net change in fair value of cash flow hedges; and

(iii) net actuarial gains and losses on defined benefit plans.

Treasury Stock

The Company repurchases its ordinary shares from time to time on the open market or in other transactions and holds such shares as treasury stock. The Company presents the cost to repurchase treasury stock as a reduction of equity.

Business Combinations

In accordance with business combinations accounting, assets acquired and liabilities assumed, as well as any contingent consideration that may be part of the acquisition agreement, are recorded at their respective fair values at the date of acquisition. For acquisitions that include contingent consideration, the fair value is estimated on the acquisition date as the present value of the expected contingent payments, determined using weighted probabilities of possible payments. The Company remeasures the fair value of the contingent consideration at each reporting period until the contingency is resolved. Except for measurement period adjustments, the changes in fair value are recognized in the consolidated statements of income. Any

earn-out

which is not considered a contingent consideration is recognized as compensation expense over expected service period.

In accordance with business combinations accounting, the Company allocates the purchase price of acquired companies to the tangible and intangible assets acquired and liabilities assumed, as well as to

in-process

research and development based on their estimated fair values. Such valuations require management to make significant estimates and assumptions, especially with respect to intangible assets. As a result of the significant judgments that need to be made, the Company obtains the assistance of independent valuation firms. The Company completes these assessments as soon as practical after the closing dates. Any excess of the purchase price over the estimated fair values of the identifiable net assets acquired is recorded as goodwill.

Although the Company believes the assumptions and estimates of fair value it has made in the past have been reasonable and appropriate, they are based in part on historical experience and information obtained from

the management of the acquired companies and are inherently uncertain and subject to refinement. Critical estimates in valuing certain assets acquired and liabilities assumed include but are not limited to: future expected cash flows from license and service sales, maintenance, customer contracts and acquired developed technologies, expected costs to develop the

in-process

research and development into commercially viable products and estimated cash flows from the projects when completed and the acquired company’s brand awareness and discount rate. Unanticipated events and circumstances may occur that may affect the accuracy or validity of such assumptions, estimates or actual results. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill, if the changes are related to conditions that existed at the time of the acquisition. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments, based on events that occurred subsequent to the acquisition date, are recorded in its consolidated statements of income.

The Company estimates the fair values of its services, hardware, software license and maintenance obligations assumed. The estimated fair values of these performance obligations are determined utilizing a cost

build-up

approach. The cost

build-up

approach determines fair value by estimating the costs related to fulfilling the obligations plus a normal profit margin.

The Company may establish a valuation allowance for certain deferred tax assets and estimate the value of uncertain tax positions of a newly acquired entity. This process requires significant judgment and analysis.

Income Taxes

The Company records deferred income taxes to reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting and tax purposes. Deferred taxes are computed based on enacted tax rates anticipated to be in effect when the deferred taxes are expected to be paid or realized. A valuation allowance is provided for deferred tax assets if it is more likely than not, the Company will not be able to realize their benefit.

Deferred tax liabilities and assets are classified as noncurrent on the balance sheet. Deferred tax liabilities also include anticipated withholding taxes due on subsidiaries’ earnings when paid as dividends to the Company.

The Company recognizes the tax benefit from an uncertain tax position only if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The tax benefits recognized in the financial statements from such a position is measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Interest and penalties related to uncertain tax positions are recognized in the provision for income taxes. See Note

to the consolidated financial statements.

Revenue Recognition

The Company recognizes revenue under the five-step methodology required under ASC 606, which requires the Company to identify the contract with the customer, identify the performance obligations in the contract, determine the transaction price, allocate the transaction price to the performance obligations identified, and recognize revenue when (or as) each performance obligation is satisfied.

Revenue is recognized net of any revenue-based taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the Company from a customer (for example, sales, use and value added taxes).

The Company’s primary revenue categories, related performance obligations, and associated recognition patterns are as follows:

Revenue Recognition for projects

— The Company usually sells its software licenses as part of an overall solution offered to a customer including significant customization, modification, implementation and integration. Those services are deemed essential to the software. As a result, revenue related to these projects is recognized over time, usually based on a percentage that incurred labor effort to date bears to total projected labor effort. Incurred effort represents work performed, which corresponds with, and thereby best depicts, the transfer of control to the customer. Revenue from customization, implementation, modification and integration services is also recognized over the course of the projects. When total cost estimates for these types of arrangements exceed revenues in a fixed-price arrangement, the estimated losses are recognized immediately based upon the cost applicable to the delivering unit. Significant judgment is required when estimating total labor effort and progress to completion on these arrangements, as well as whether a loss is expected to be incurred on the project.

As a significant portion of the Company’s revenue is satisfied over time as work progresses, the annual and quarterly operating results may be affected by the size and timing of the initiation of customer projects as well as the Company’s progress in completing such projects.

Revenue Recognition for subsequent license fee

— Subsequent license fee revenue is recognized when the customer has access to the license and the right to use and benefit from the license. In cases when the conditions require delivery, then delivery must have occurred for purposes of revenue recognition. Subsequent license fee is based on a customer’s subscriber level, transaction volume or other measurements when greater than the level specified in the contract for the initial license fee.

Revenue Recognition for term-based license and perpetual license

— Revenue related to software solutions that do not require significant customization, implementation and modification are recognized upon delivery.

Revenue Recognition for maintenance

— Maintenance revenue is recognized ratably over the term of the maintenance agreement.

Revenue Recognition for ongoing services

— Revenue from ongoing support services is recognized as work is performed, revenue from other ongoing services is recognized over time as services are preformed, using one method of measuring performance such as time elapsed, output produced, volume of data processed or subscriber count that provides the most faithful depiction of the transfer of services.

Revenue Recognition for managed services arrangement

— Managed services arrangements include management of data center operations and IT infrastructure, application management and ongoing support, management of

end-to-end

business processes, and managed transformation that includes both a transformation project as well as taking over managed services responsibility.

The revenue from managed services arrangement is recognized for each individual performance obligation according to its relevant revenue category, including but not limited to, revenue from the management of a customer’s operations, revenue from projects and revenue from ongoing support services.

Revenue from the management of a customer’s operations pursuant to managed services arrangements, is recognized over time as services are performed, using one method of measuring performance such as time elapsed, output produced, volume of data processed or subscriber count that provides the most faithful depiction of the transfer of services, pursuant to the specific contract terms of the managed services arrangement. Typically, managed services arrangements are long term in duration and are not subject to significant seasonality.

Revenue Recognition for third-party hardware and software

— Third-party hardware sales are recognized upon delivery or installation, and revenue from third-party software sales is recognized upon delivery. Maintenance revenue is recognized ratably over the term of the maintenance agreement Revenue from third-party hardware and software sales is recorded at gross amount for transactions in which the Company control the third-party hardware and software prior to fulfilling the performance obligation. In specific circumstances where the Company do not meet the above criteria, revenue is recognized on a net basis. In certain arrangements, the Company may earn revenue from other third-party services which is recorded at a gross amount as it controls the services before transferring them to the customer.

Arrangements with Multiple Performance Obligations

— Many of the Company’s agreements include multiple performance obligations. The Company allocates the transaction price for each contract to each performance obligation identified in the contract based on the relative standalone selling price (SSP). The Company determines SSP for the purposes of allocating the transaction price to each performance obligation by considering several external and internal factors including, but not limited to, transactions where the specific performance obligation sold separately, historical actual pricing practices and geographies in which the Company offers its services in accordance with ASC 606. The determination of SSP requires the exercise of judgement. If a specific performance obligation is sold for a broad range of amounts (that is, the selling price is highly variable) or if the Company has not yet established a price for that good or service, and the good or service has not previously been sold on a standalone basis (that is, the selling price is uncertain), the Company applies the residual approach whereby all other performance obligations within a contract are first allocated a portion of the transaction price based upon their respective SSPs with any residual amount of transaction price allocated to the remaining specific performance obligation.

Billing terms and conditions generally vary by contract category. Amounts are typically billed as work progresses in accordance with agreed-upon contractual terms, either at periodic intervals (e.g., monthly or quarterly) or upon achievement of contractual milestones. In cases where timing of revenue recognition significantly differs from the timing of invoicing, the Company considers whether a significant financing component exists. The Company elected to use the practical expedient in assessing the financing component in contracts where the time between cash collection and performance is less than one year.

Accounts Receivable — Billed

— Billed accounts receivables include all outstanding invoices to customers, as well as amounts allowed to be billed according to contractual billing terms with customers.

Accounts Receivable — Unbilled

— Unbilled accounts receivable include all revenue amounts that had not been billed as of the balance sheet date due to contractual billing terms with customers. Unbilled accounts receivable that are expected to be billed beyond the next 12 months are considered long-term unbilled receivables and included in other noncurrent assets.

Deferred Revenue

— Deferred revenue represents billings to customers for which revenue has not yet been recognized. Deferred revenue that is expected to be recognized beyond the next 12 months is considered long-term deferred revenue and included in other noncurrent liabilities.

Assets Recognized from the Costs to Obtain a Contract with a Customer

— Incremental costs of obtaining a contract (e.g., sales commissions) are capitalized and amortized on a

pro-rata

basis over the contract period if the Company expects to recover those costs. Commissions on renewals are commensurate with the commission from the initial arrangement. Incremental costs of obtaining a contract include only those costs the Company incurs to obtain a contract that it would not have incurred if the contract had not been obtained. The Company has determined that certain sales commissions programs meet the requirements to be capitalized, which prior to the

adoption of ASC 606, were previously expensed as incurred. Additionally, as a practical expedient, the Company expenses costs to obtain a contract as incurred if the amortization period would have been a year or less. The amortization of these costs is included in selling, general and administrative expenses in the Company’s consolidated statements of income.

In certain circumstances where the Company enters into a contract with a customer for the provision of managed services for a defined period of time, the Company defers certain direct costs incurred at the inception of the contract. These costs include expenses incurred in association with the origination of a contract. In addition, if the revenue for a delivered item is not recognized because it is not separable from the undelivered item, then the Company also defers the cost of the delivered item. The deferred costs are amortized on a straight-line basis over the managed services period, or over the recognition period of the undelivered item. Revenue associated with these capitalized costs is deferred and is recognized over the same period.

Cost of Revenue

Cost of revenue consists of all costs associated with providing software licenses and services to customers, third party hardware and software including identified losses on contracts. Estimated losses on contracts satisfied over time as work performed are recognized in the period in which the loss is identified.

Cost of revenue also includes costs of third-party products associated with selling third-party computer hardware and software products to customers and other third-party services, when the related revenue is recorded at the gross amount. Customers purchasing third-party products and services from the Company generally do so in conjunction with the purchase of the Company’s software and services.

Research and Development

Research and development expenditures consist of costs incurred in the development of new software modules and product offerings, either as part of the Company’s internal product development programs, which are sold, leased or otherwise marketed. Research and development costs are expensed as incurred.

Based on the Company’s product development process, technological feasibility is established upon completion of a detailed program design or, in the absence thereof, completion of a working model. Costs incurred by the Company after achieving technological feasibility and before the product is ready for customer release have been insignificant.

Equity-Based Compensation

The Company measures and recognizes the compensation expense for all equity-based payments to employees and directors based on their estimated fair values. The Company estimates the fair value of employee stock options at the date of grant using a Black-Scholes valuation model and values restricted stock based on the market value of the underlying shares at the date of grant. The Company recognizes compensation costs using the graded vesting attribution method that results in an accelerated recognition of compensation costs in comparison to the straight-line method.

The Company uses a combination of implied volatility of the Company’s traded options and historical stock price volatility (“blended volatility”) as the expected volatility assumption required in the Black-Scholes option valuation model. As equity-based compensation expense recognized in the Company’s consolidated statements of income is based on awards ultimately expected to vest, it has been reduced for estimated forfeitures.

Concentrations of Credit Risk

Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash and cash equivalents, short-term interest-bearing investments, and trade receivables. Cash and cash equivalents are maintained with several financial institutions. Generally, these deposits may be redeemed upon demand and are maintained with financial institutions with reputable credit and therefore bear minimal credit risk. The Company seeks to mitigate its credit risks by spreading such risks across multiple financial institutions and monitoring the risk profiles of these counterparties. The Company has conservative investment policy guidelines under which it invests its excess cash primarily in highly liquid U.S. dollar-denominated securities. The Company’s revenue is generated primarily in North America. To a lesser extent, revenue is generated in Europe and the rest of the world. Most of the Company’s customers are among the largest communications and media companies in the world (or are owned by them). The Company’s business is subject to the effects of general global economic conditions and market conditions in the communications industry. The Company performs ongoing credit analyses of its customer base and generally does not require collateral.

The Company evaluates accounts receivable to determine if they ultimately will be collected. Significant judgments and estimates are involved in performing this evaluation, which are based on factors that may affect a customer’s ability to pay, such as past experience, credit quality of the customer, age of the receivable balance and current economic conditions. The allowance for doubtful accounts is for estimated losses resulting from accounts receivable for which their collection is not reasonably probable. The allowance for doubtful accounts as of September 30, 2020 and 2019, was $23,419 and $36,121, respectively. As of September 30, 2020, the Company had one customer with an accounts receivable balance of more than 10% of total accounts receivable, amounting to 22%, which was lower than its respective portion of total revenue. As of September 30, 2019, the Company had one customer with an accounts receivable balance of more than 10% of total accounts receivable, amounting to 16%, which was lower than its respective portion of total revenue.

Earnings per Share

Basic earnings per share is calculated using the weighted average number of shares outstanding during the period. Diluted earnings per share is computed on the basis of the weighted average number of shares outstanding and the effect of dilutive outstanding equity-based awards using the treasury stock method. The Company includes participating securities (unvested restricted shares that contain

non-forfeitable

rights to dividends or dividend equivalents) in the computation of earnings per share

ursuant to the

two-class

method, which calculates earnings per share for common shares and participating securities.

Derivatives and Hedging

The Company carries out transactions involving foreign currency exchange derivative financial instruments. The transactions are designed to hedge the Company’s exposure in currencies other than the U.S. dollar. The Company recognizes derivative instruments as either assets or liabilities and measures those instruments at fair value. If a derivative meets the definition of a cash flow hedge and is so designated, changes in the fair value of the derivative are recognized in other comprehensive income (loss) until the hedged item is recognized in earnings. The ineffective portion of a derivative designated as a cash flow hedge is recognized in earnings. If a derivative does not meet the definition of a cash flow hedge, the changes in the fair value are included in earnings.

Recent Accounting Standards

In March 2020, the Financial Accounting Standards Board, or FASB, issued Accounting Standard Update, or ASU

No. 2020-04:

“

Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial

Reporting”.

The ASU provides temporary optional expedients and exceptions on certain contract modifications, hedge relationships and other transactions that reference London Inter-bank Offered Rate (“LIBOR”) or other reference rates expected to be discontinued due to the reference rate reform. This ASU is effective as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adoption of this ASU on its consolidated financial statements.

In December 2019, the FASB issued Accounting Standard Update, or ASU

No. 2019-12:

“

Simplifying the Accounting for Income Taxes

”. The ASU simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intra period tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. This ASU will be effective for the Company on October 1, 2021, and early adoption is permitted. The Company currently expects that adoption of this ASU will not have a material impact on its consolidated financial statements.

In November 2018, the FASB, issued ASU

No. 2018-18

, “Collaborative Arrangements

”. The ASU clarifies the interaction between collaborative arrangements and the new revenue standards. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that adoption of this ASU will not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU

No. 2018-15

, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract”.

The ASU amends the definition of hosting arrangement and requires a customer in a hosting arrangement that is a service contract to capitalize certain implementation costs as if the arrangement was an

internal-use

software project. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that adoption of this ASU will not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU

No. 2018-13

, “Fair Value Measurement”.

The ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that adoption of this ASU may result in changes to its financial statements disclosure but will not have a material impact on its consolidated financial statements.

In August 2018, the FASB issued ASU

No. 2018-14,

“

Changes to the Disclosure Requirements for Defined Benefit Plans”

. The ASU makes minor changes to the disclosure requirement for employers that sponsor defined pension and/or other post-retirement benefit plans. This ASU will be effective for the Company on October 1, 2020. The Company expects that the adoption of this ASU will not have a material impact on its consolidated financial statements.

In August 2017, the FASB issued ASU

No. 2017-12,

“

Targeted Improvements to Accounting for Hedging Activities

”

. The ASU amends existing guidance to simplify the application of hedge accounting in certain

situations and allows companies to better align their hedge accounting with their risk management activities. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that adoption of this ASU will not have a material impact on its consolidated financial statements.

In January 2017, the FASB, issued an Accounting Standard Update, or ASU

No. 2017-04,

“Simplifying the Test for Goodwill Impairment”

. The ASU simplifies the accounting for goodwill impairment by removing Step 2 of the goodwill impairment test. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that adoption of this ASU will not have an impact on its consolidated financial statements.

In June 2016, the FASB issued ASU

No. 2016-13,

“

Measurement of Credit Losses on Financial Instruments

”

. The ASU which introduces an impairment model that is based on expected losses rather than incurred losses and will apply to financial assets subject to credit losses and measured at amortized cost, and certain

off-balance

sheet credit exposures. This ASU will be effective for the Company on October 1, 2020. The Company currently expects that the adoption of this ASU will not have a material impact on its consolidated financial statements.

Adoption of New Accounting Standards

In February 2016, the FASB issued ASU

No. 2016-02,

“Leases”

. The ASU increases transparency and comparability by providing additional information to users of financial statements regarding an entity’s leasing activities. The ASU requires reporting entities to recognize lease assets and lease liabilities on the balance sheet for most leases, including operating leases, with a term greater than twelve months. As of October 1, 2019, the Company adopted this ASU using the modified retrospective transition approach. Prior period amounts were not adjusted. The Company elected the package of practical expedients which does not require reassessment of prior conclusions related to identifying leases, lease classification or initial direct costs. The Company also elected the practical expedient not to separate

non-lease

components from lease components and instead to account for each separate lease component and the

non-lease

components associated with that lease component as a single lease component for its real estate and vehicle leases. The adoption of this ASU did not have a material impact on its consolidated statement of income and on its consolidated statement of cash flow.

The impact of adopting this ASU on the Company’s Consolidated

Balance

Sheets

was as

follows


	Balance as of September 30, 2019			Adjustments due to ASC 842			Balance as of October 1, 2019
Balance Sheet:
Prepaid expenses and other current assets	$	216,084		$	(6,697	)	$	209,387
Lease assets		—			281,785			281,785
Other noncurrent assets		423,941			(2,755	)		421,186
Accrued expenses and other current liabilities		(647,657	)		3,553			(644,104	)
Lease liabilities (current)		—			(63,351	)		(63,351	)
Lease liabilities (non-current)		—			(221,050	)		(221,050	)
Other noncurrent liabilities		(334,922	)		8,515			(326,407	)

See Note 16 to the consolidated financial statements for further details.

In June 2018, the FASB issued ASU

No. 2018-07,

“

Improvements to Nonemployee Share-Based Payment Accounting

”

. The ASU aligns the measurement and classification for share-based payments to

nonemployees

with the guidance for share-based payments to employees, with certain exceptions. The Company prospectively adopted this ASU effective October 1, 2019. As of the date of the adoption there was no impact on the Company’s consolidated financial

statements

Acquisitions	12 Months Ended
Acquisitions	Sep. 30, 2020
Business Combinations [Abstract]
Acquisitions	Note 3 — Acquisitions Entities acquired by the Company during the last three fiscal years have been consolidated into the Company’s results of operations since their respective acquisition dates. These acquisitions, individually and in the aggregate, were not material in any fiscal year. During fiscal year 2020, the Company acquired three companies and o ther intangible assets for total consideration of approximately $291,459, among them the largest is Openet, which offers cloud-native capabilities, network pedigree, and deep 5G charging, policy and data management expertise and whose solutions complement the Amdocs portfolio. During fiscal year 2019, we acquired three companies for total consideration of approximately $64,963, among them the largest is TTS Wireless a leading provider of mobile network engineering services, specializing in network optimization, planning and software-enabled solutions. See Note 9 to the consolidated financial statement.

Revenue

12 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Note 4 — Revenue

Contract Balances

The following table provides information a

out Accounts receivable, both billed and unbilled and deferred revenue:


	As of
	September 30, 2020			September 30, 2019
Accounts receivable — billed (net of allowances for doubtful accounts of $23,419 and $36,121 as of September 30, 2020 and 2019, respectively)	$	685,485		$	760,797
Accounts receivable — unbilled (current)	$	175,548		$	227,061
Accounts receivable — unbilled (non-current)	$	42,089		$	16,987

Total Accounts receivable — unbilled	$	217,637		$	244,048
Deferred revenue (current)	$	(126,841	)	$	(118,182	)
Deferred revenue (non-current)	$	(16,529	)	$	(23,785	)

Total Deferred revenue	$	(143,370	)	$	(141,967	)

Revenue recognized during the year ended September 30, 2020, which was included in deferred revenue (current) as of September 30, 2019 was $104,648. Revenue recognized during the year ended September 30, 2019, which was included in deferred revenue (current) as of October 1, 2018 was $93,508.

Remaining Performance Obligations from Contracts with Customer

As of September 30, 2020, the aggregate amount of the transaction price allocated to remaining performance obligations that are unsatisfied or partially unsatisfied was approximately $5.1 billion. Remaining performance obligations typically include the remaining

non-cancelable,

committed and fixed portion of contracts for their entire duration and therefore it is not comparable to what the Company considers to be next 12 months backlog. Given the profile of contract terms, the majority of this amount is expected to be recognized as revenue over the next three years.

Disaggregation of Revenue

The Company considers information that is regularly reviewed by its chief operating decision makers in evaluating financial performance to disaggregate revenue, see

Note 22 — Segment

Information and Sales to Significant Customers.

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-URI http://asc.fasb.org/topic&trid=49130388

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130550-203045

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130558-203045

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045

Investments, Debt and Equity Securities [Abstract]

Fair Value Measurements

12 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Note 5 — Fair Value Measurements

The Company accounts for certain assets and liabilities at fair value. Fair value is the price that would be received from selling an asset or that would be paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Company considers the principal or most

advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability.

The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety.

The three levels of inputs that may be used to measure fair value are as follows:

Level 1:

Quoted prices in active markets for identical assets or liabilities;

Level 2:

Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets with insufficient volume or infrequent transactions (less active markets), or other inputs that are observable (model-derived valuations in which significant inputs are observable) or can be derived principally from, or corroborated by, observable market data; and

Level 3:

Unobservable inputs

hat are supported by little or no market activity that is significant to the fair value of the assets or liabilities.

The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2020 and 2019:


	As of September 30, 2020
	Level 1		Level 2		Level 3			Total
Available-for-sale securities:
Money market funds	$	558,633	$	—	$	—		$	558,633
Corporate bonds		—		752		—			752

Total available-for-sale securities		558,633		752		—			559,385

Equity Investments		—		—		24,211			24,211
Derivative financial instruments, net		—		20,636		—			20,636

Other liabilities		—		—		(19,641	)		(19,641	)

Total	$	558,633	$	21,388	$	4,570		$	584,591


	As of September 30, 2019
	Level 1		Level 2		Level 3			Total
Available-for-sale securities:
Money market funds	$	69,370	$	—	$	—		$	69,370

Total available-for-sale securities		69,370		—		—			69,370

Equity Investments		—		—		18,008			18,008
Derivative financial instruments, net		—		7,890		—			7,890

Other liabilities		—		—		(29,805	)		(29,805	)

Total	$	69,370	$	7,890	$	(11,797	)	$	65,463

Available-for-sale

securities that are classified as Level 2 assets are priced using observable data that may include quoted market prices for similar instruments, market dealer quotes, market

preads,

non-binding

market prices that are corroborated by observable market data and other observable market information. The Company’s

derivative instruments are classified as Level 2 as they represent foreign currency forward and option contracts valued primarily based on observable inputs including forward rates and yield curves. The Company did not have any transfers between Level 1 and Level 2 fair value measurements during fiscal year 2020. Level 3 liabilities relate to certain acquisition-related liabilities, which were generally valued using a Monte-Carlo simulation model. These liabilities were included in both accrued expenses and other current liabilities and other noncurrent liabilities as of September 30, 2020 and 2019. The decrease in Level 3 liabilities is mainly a result of payments of certain acquisition-related liabilities during fiscal year 2020. Level 3 assets relate to equity investments, which were valued based on price changes in orderly transactions for similar private investments of the same issuer. The increase in Level 3 assets is as a result of changes in the fair value was recorded in the consolidated statement of income.

Fair Value of Financial Instruments

The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities, accrued personnel costs and short-term financing arrangements approximate their fair value because of the relatively short maturity of these items.

Available-For-Sale Securities

12 Months Ended

Sep. 30, 2020

Available-For-Sale Securities

Note 6 — Available-For-Sale Securities

In fiscal year 2019 the Company sold most of its

available-for-sale

securities, in total amount of $101,287, the realized losses recognized from this sale were immaterial and were recorded in the consolidated statements of income. In Fiscal year 2020, the Company didn’t have any sale of

Available-for-sale securities.

Available-for-sale

securities consist of the following interest-bearing

investments


	As of September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	558,633	$	—	$	—	$	558,633
Corporate bonds		754		—		2		752

Total(1)	$	559,387	$	—	$	2	$	559,385

(1)

Available-for-sale

securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and

available-for-sale

securities with maturities of 90 days or less from the date of acquisition were included in cash and cash equivalents on the Company’s balance sheet. As of September 30, 2020, $752 of securities were classified as short-term interest-bearing investments and $558,633 of securities were classified as cash and cash equivalents.


	As of September 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	69,370	$	—	$	—	$	69,370

Total(1)	$	69,370	$	—	$	—	$	69,370

(1)

Available-for-sale

securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and

available-for-sale

securities with maturities of 90 days or less from the date of acquisition were included in cash and cash equivalents on the Company’s balance sheet. As of

September

30, 2019, all the securities were classified as cash and cash

equivalents

As of September 30, 2020, the immaterial unrealized losses attributable to the Company’s

available-for-sale

securities were primarily due to credit spreads and interest rate movements. The Company assessed whether such unrealized losses for the investments in its portfolio were other-than-temporary. Based on this assessment, the Company did not recognize any credit losses in fiscal years 2020, 2019 and 2018. Realized gains and losses on

available-for-sale

securities were included in earning and are derived using the

first-in-first-out

(FIFO) method for determining the cost of securities.

As of September 30, 2020, the Company’s

available-for-sale

securities had the following maturity dates:


	Market Value
Due within one year	$	558,633
1 to 2 years		—
2 to 3 years		752
3 to 4 years		—
Thereafter		—

	$	559,385

Derivative Financial Instruments

12 Months Ended

Sep. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Note 7 — Derivative Financial Instruments

The Company’s risk management strategy includes the use of derivative financial instruments to reduce the volatility of earnings and cash flows associated with changes in foreign currency exchange rates. The Company does not enter into derivative transactions for trading purposes.

The Comp

ny’s derivatives expose it to credit risks from possible

non-performance

by counterparties. The Company utilizes standard counterparty master netting agreements that net certain foreign currency transactions in the event of the insolvency of one of the parties to the transaction. These master netting arrangements permit the Company to net amounts due from the Company to counterparty with amounts due to the Company from the same counterparty. Although all of the Company’s recognized derivative assets and liabilities are subject to

enforceable master netting arrangements, the Company has elected to present these assets and liabilities on a gross basis. Taking into account the Company’s right to net certain gains with losses, the maximum amount of loss due to credit risk that the Company would incur if all counterparties to the derivative financial instruments failed completely to perform, according to the terms of the contracts, based on the gross fair value of the Company’s derivative contracts that are favorable to the Company, was approximately $20,636 as of September 30, 2020. The Company has limited its credit risk by entering into derivative transactions exclusively with investment-grade rated financial institutions and monitors the creditworthiness of these financial institutions on an ongoing basis.

The Company classifies cash flows from its derivative transactions as cash flows from operating activities in the consolidated statements of cash flow.

The table below presents the total volume or notional amounts of the Company’s derivative instruments as of September 30, 2020. Notional values are in U.S. dollars and are translated and calculated based on forward rates as of September 30, 2020 for forward contracts, and based on spot rates as of September 30, 2020 for options.


	Notional Value*
Foreign exchange contracts	$	1,220,000

(*)	Gross notional amounts do not quantify risk or represent assets or liabilities of the Company but are used in the calculation of settlements under the contracts.

The Company records all derivative instruments on the balance

heet at fair value. For further information, see Note 5 to the consolidated financial statements. The fair value of the open foreign exchange contracts recorded as an asset or a liability by the Company on its consolidated balance sheets as of September 30, 2020 and September 30, 2019, is as follows:


	As of September 30,
	2020			2019
Derivatives designated as hedging instruments
Prepaid expenses and other current assets	$	21,153		$	9,344
Other noncurrent assets		1,317			585
Accrued expenses and other current liabilities		(2,089	)		(2,977	)
Other noncurrent liabilities		—			(2,072	)

		20,381			4,880
Derivatives not designated as hedging instruments
Prepaid expenses and other current assets		3,068			5,086
Accrued expenses and other current liabilities		(2,813	)		(2,076	)

		255			3,010

Net fair value	$	20,636		$	7,890

Cash Flow Hedges

In order to reduce the impact of changes in foreign currency exchange rates on its results, the Company

enters into foreign currency exchange forward and option contracts to purchase and sell foreign currencies to

hedge a significant portion of its foreign currency net exposure resulting from revenue and expense transactions denominated in currencies other than the U.S. dollar. The Company designates these contracts for accounting purposes as cash flow hedges. The Company currently hedges its exposure to the variability in future cash flows for a maximum period of approximately three years. A significant portion of the forward and option contracts outstanding as of September 30, 2020 is scheduled to mature within the next 12 months.

The effective portion of the gain or loss on the derivative instruments is initially recorded as a component of other comprehensive income (loss), a separate component of equity, and subsequently reclassified into earnings in the same line item as the related forecasted transaction and in the same period or periods during which the hedged exposure affects earnings. The cash flow hedges are evaluated for effectiveness quarterly. As the critical terms of the forward contract or option and the hedged transaction are matched at inception, the hedge effectiveness is assessed generally based on changes in the fair value for cash flow hedges, as compared to the changes in the fair value of the cash flows associated with the underlying hedged transactions. Hedge ineffectiveness, if any, and hedge components, such as time value, excluded from assessment of effectiveness testing for hedges of estimated revenue from customers, are recognized immediately in interest and other expense, net.

The effect of the Company’s cash flow hedging instruments in the consolidated statements of income for the fiscal years ended September 30, 2020, 2019 and 2018, respectively, which partially offsets the foreign currency impact from the underlying exposures, is summarized as follows:


	Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion) Year Ended September 30,
	2020		2019			2018
Line item in consolidated statements of income:
Revenue	$	834	$	19		$	(1,129	)
Cost of revenue		4,166		(8,627	)		15,877
Research and development		1,646		(2,059	)		3,127
Selling, general and administrative		2,500		(2,309	)		3,462

Total	$	9,146	$	(12,976	)	$	21,337

The activity related to the changes in net unrealized gains (losses) on cash flow hedges recorded in accumulated other comprehensive income (loss), net of tax, is as follows:


	Year Ended September 30,
	2020			2019			2018
Net unrealized gain (loss) on cash flow hedges, net of tax, beginning of period	$	3,945		$	(26,608	)	$	24,508
Changes in fair value of cash flow hedges, net of tax		21,903			19,228			(31,908	)
Reclassification of (gain) loss into earnings, net of tax		(7,012	)		11,325			(19,208	)

Net unrealized gain (loss) on cash flow hedges, net of tax, end of period	$	18,836		$	3,945		$	(26,608	)

Net unrealized gain (loss) from cash flow hedges recognized in other comprehensive income (loss) were $26,408, $20,035 and $(34,260), or $21,903, $19,228 and $(31,908), net of taxes, during the fiscal years ended September 30, 2020, 2019 and 2018,

respectively.

Of the net gains related to derivatives designated as cash flow hedges and recorded in accumulated other comprehensive income (loss) as of September 30, 2020, a net gain of $15,721 will be reclassified into earnings during fiscal 2021 and will partially offset the foreign currency impact from the underlying exposures. The amount ultimately realized in earnings will likely differ due to future changes in foreign exchange rates.

The ineffective portion of the change in fair value of a cash flow hedge, including the time value portion excluded from effectiveness testing for the fiscal years ended September 30, 2020, 2019 and 2018, was not material.

Cash flow hedges are required to be discontinued in the event it becomes probable that the underlying forecasted hedged transaction will not occur. The Company did not discontinue any cash flow hedges during any of the periods presented nor does the Company anticipate any such discontinuance in the normal course of business.

Other Risk Management Derivatives

The Company also enters into foreign currency exchange forward and option contracts that are not designated as hedging instruments under hedge accounting and are used to reduce the impact of foreign currency on certain balance sheet exposures and certain revenue and expense transactions.

These instruments are generally short-term

n nature, with typical maturities of less than 12 months, and are subject to fluctuations in foreign exchange rates.

The effect of the Company’s derivative instruments not designated as hedging instruments in the consolidated statements of income for the fiscal years ended September 30, 2020, 2019 and 2018,

respectively, which partially offsets the foreign currency impact from the underlying exposure, is summarized as follows:


	(Losses) Gains Recognized in Income Year Ended September 30,
	2020			2019			2018
Line item in statements of income:
Cost of revenue	$	(718	)	$	401		$	(4,577	)
Research and development		(341	)		14			(736	)
Selling, general and administrative		(559	)		294			(950	)
Interest and other expense, net		255			5,845			7,038
Income taxes		(679	)		(528	)		1,581

Total	$	(2,042	)	$	6,026		$	2,356

Property and Equipment, Net

12 Months Ended

Sep. 30, 2020

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

Note 8 — Property and Equipment, Net

The components of property and equipment, net are:


	As of September 30,
	2020			2019
Computers, related equipment and software	$	1,163,807		$	1,109,465
Building and land(1)		177,255			109,446
Leasehold improvements		234,777			230,817
Furniture, fixtures and other		51,831			47,813

Property and equipment, gross		1,627,670			1,497,541
Less accumulated depreciation		(1,019,719	)		(972,227	)

Property and equipment, net	$	607,951		$	525,314

(1)	For more details, see also note 2.

Total depreciation expense

for fiscal years

2020,

2019

and

2018,

was $

117,632,

111,387

and $

105,439,

respectively.

As of September 30, 2020 and 2019, the costs, net of accumulated depreciation of software assets developed for internal use were $179,837 and $171,331

, respectively.

Goodwill and Intangible Assets, Net

12 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

Note 9 — Goodwill and Intangible Assets, Net

The following table presents details of the Company’s total goodwill:


As of September 30, 2018	$	2,444,895
Goodwill resulting from acquisitions(1)		17,484
Other		456

As of September 30, 2019	$	2,462,835
Goodwill resulting from acquisitions(2)		118,628
Other		(2,818	)

As of September 30, 2020	$	2,578,645

(1)	Mainly relates to the acquisition of TTS. In allocating the total purchase price for T TS , based on estimated fair values, the Company recorded $8,218 of goodwill, $29,500 of customer relationships to be amortized over approximately six years, $2,100 of core technology to be amortized over approximately six years and $1,300 of trade mark to be amortized over four years.

(2)

Mainly relates to the acquisition of Openet. In allocating the total preliminary purchase price for Openet, based on estimated fair values, the Company recorded

$102,898 of goodwill, $40,409 of customer relationships to be amortized over approximately eight years, $53,614 of core technology to be amortized over approximately five years and $2,594 of trade mark to be amortized over two years.

The Company performs an annual goodwill impairment test during the fourth quarter of each fiscal year, or more frequently if impairment indicators are present. The Company operates in one operating segment, and this segment comprises its only reporting unit. In calculating the fair value of the reporting unit, the Company uses its market capitalization and a discounted cash flow methodology. There was no impairment of goodwill in fiscal years 2020, 2019 or 2018

The following table presents details regarding the Company’s total definite-lived purchased intangible assets:


	Gross		Accumulated Amortization			Net
September 30, 2020
Core technology	$	896,814	$	(735,534	)	$	161,280
Customer relationships		642,575		(517,670	)		124,905
Other		47,540		(37,391	)		10,149

Total	$	1,586,929	$	(1,290,595	)	$	296,334

September 30, 2019
Core technology	$	775,479	$	(690,961	)	$	84,518
Customer relationships		594,555		(483,313	)		111,242
Other		44,946		(35,544	)		9,402

Total	$	1,414,980	$	(1,209,818	)	$	205,162

The amortization expenses related to the Company’s definite-lived purchased intangible assets were $80,777, $94,385 and $105,785 for the years

ended 2020, 2019 and 2018

respectively.

The estimated future amortization expense of def

nite-lived purchased intangible assets as of September 30, 2020 is as follows:


	Amount
Fiscal year:
2021	$	78,345
2022		63,819
2023		46,672
2024		38,954
2025		34,534
Thereafter		34,010

Total	$	296,334

Non-recurring charges	12 Months Ended
Non-recurring charges	Sep. 30, 2020
Non-recurring charges [Abstract]
Non-recurring charges	Note 10 — Non-recurring charges During fiscal year 2018 the C ompany incurred non-recurring charges of a loss incurred to settle a long-running legal dispute in total amount of $55,000 including legal costs and also incurred restructuring charges of $30,057 primarily related to employee severance expenses. During fiscal year 2019 the Company paid the settlement amount of $50,000 and $5,000 in legal and other fees. During fiscal years 2020, 2019 and 2018 the Company paid most of the restructuring charges, and the remaining amount will be paid over the next several quarters.

Income Taxes

12 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Income Taxes

Note 11 — Income Taxes

The provision (benefit) for income taxes consists of the following:


	Year Ended September 30,
	2020		2019			2018
Current	$	55,243	$	102,391		$	42,047
Deferred		30,239		(13,950	)		25,098

Income taxes	$	85,482	$	88,441		$	67,145

All income taxes are from continuing operations reported by the Company in the applicable taxing jurisdiction. Income taxes also include anticipated withholding taxes due on subsidiaries’ earnings when paid as dividends to the Company.

The Company maintained a tax receivable balance of $58,336 and $53,143 as of September 30, 2020 and 2019, respectively, which is included in Prepaid expenses and other current assets.

Deferred income taxes are comprised of the following components:


	As of September 30,
	2020			2019
Deferred tax assets:
Deferred revenue	$	25,252		$	30,659
Employee compensation and benefits		75,689			76,327
Intangible assets, computer software and intellectual property		18,705			11,805
Tax credits, net capital and operating loss carryforwards		142,718			153,062
Lease liabilities		71,204			—
Other		52,611			73,249

Total deferred tax assets		386,179			345,102
Valuation allowances		(69,455	)		(85,533	)

Total deferred tax assets, net		316,724			259,569

Deferred tax liabilities:
Anticipated withholdings on subsidiaries’ earnings		(81,489	)		(70,961	)
Intangible assets, computer software and intellectual property		(114,772	)		(104,926	)
Lease assets		(69,215	)		—
Other		(90,825	)		(81,736	)

Total deferred tax liabilities		(356,301	)		(257,623	)

Net deferred tax (liabilities) assets	$	(39,577	)	$	1,946

The effective income tax rate varied from the statutory Guernsey tax rate as follows:


	Year Ended September 30,
	2020			2019			2018
Statutory Guernsey tax rate		0	%		0	%		0	%
Foreign taxes(1)		14.7			15.6			15.9

Effective income tax rate		14.7	%		15.6	%		15.9	%

As a Guernsey company subject to a corporate tax rate of zero percent, the Company’s overall effective tax rate is attributable to foreign taxes. The Company’s income before income tax expense is considered to be foreign

income

(1)	Foreign taxes for the year ended Sep 30, 2020:

In fiscal year 2020, foreign taxes

included a total amount of releases of gross

unrecognized

tax benefits of $

47,582

relating to effectively settled arrangements with tax authorities, changes in facts and circumstances resulting in a change in measurement of certain positions and expiration of the periods set forth in statutes of limitations in certain jurisdictions. The majority of the release was offset by decrease in tax assets and increase in tax liabilities and as a result a net benefit of $

14,971

was included within income tax expense for fiscal year 2020.

Foreign taxes in fiscal year 2020 also included a b

nefit of $15,438 resulting from the release of valuation allowances on deferred tax assets at certain of the Company’s subsidiaries, which will, more likely than not,

be realized due to the Company’s projections of future taxable income.

On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) to provide certain relief as a result of the

COVID-19

outbreak. Some of the key income

tax-related

provisions of the CARES Act include modification in the usage of net operating losses, interest deductions and payroll benefits. Furthermore,

ther governments have offered and may continue to offer support to companies who operate in those countries.

Foreign taxes in fiscal year 2020 also included a tax benefit of $4,964 resulting from tax enactments

related to the

COVID-19

in certain jurisdictions.

(1)	Foreign taxes for the year ended Sep 30, 2019:

In fiscal year 2019, foreign taxes included a benefit of $26,529 that was primarily attributable to the expiration of the periods set forth in statutes of limitations and to a lesser extent from the conclusions of tax audits related to unrecognized tax benefits accumulated over several years in certain jurisdictions.

Foreign taxes in fiscal year 2019 also included a benefit of $12,650 resulting from the release of valuation allowances on deferred tax assets at certain of the Company’s subsidiaries, which will, more likely than not, be realized due to the Company’s projections of future taxable income.

(1)	Foreign taxes for the year ended Sep 30, 2018:

In fiscal year 2018, foreign taxes included a benefit of $9,564 due to conclusions of tax audits in certain jurisdictions, which resulted in an increase to the Company’s tax credits carryforwards and a reduction to the Company’s provision for gross unrecognized tax benefits. In addition, foreign taxes in fiscal year 2018 included a benefit of $18,022 that was attributable to the expiration of the periods set forth in statutes of limitations related to unrecognized tax benefits accumulated over several years in certain jurisdictions. Foreign taxes in fiscal year 2018 also included a tax expenses of $12,032 resulting from the creation of valuation allowances on deferred tax assets at certain of the Company’s subsidiaries, which may not be realized based on the Company’s projections of future taxable income.

In addition, foreign taxes in fiscal year 2018 included a provisional expense of $2,321 relating to changes in tax law in the United States pursuant to SAB No. 118. The provisional expense is attributable to deemed repatriation of foreign income partially offset by a benefit resulting from the re-evaluation of the Company’s deferred tax assets and liabilities due to the expected lower blended effective U.S. federal tax rate when the assets and liabilities are expected to be utilized.

As an indirect consequence to the changes in tax law in the United States the Company no longer makes a permanently reinvest assertion relating to one of its subsidiaries, therefore, a provisional tax liability of $4,059 was recorded related to the tax implications of remitting earnings that were previously asserted as permanently reinvested.

During fiscal year 2018, as a result of funding decisions for the construction of the Company’s new campus in Israel, see also Note 2, the Company recorded a tax benefit of $28,795 related to the release of withholding and income tax reserves for unremitted earnings.

As of September 30, 2020 and 2019, the Company continues to indefinitely reinvest certain undistributed earnings of its foreign subsidiary and as a result has not recorded deferred tax liabilities in an amount of $28,795.

During fiscal year 2020, the net decrease in valuation allowances was $16,078. The valuation allowances, related to the uncertainty of realizing tax benefits primarily for tax credits, net capital and operating loss carryforwards related to certain of

the Company’s subsidiaries. As of September 30, 2020, the Company had tax credits, net capital and operating loss carryforwards of $829,260 of which $245,843 have expiration dates through 2040, and the remainder do not expire.

During fiscal year 2019, the net decrease in valuation

allowances was $

27,194

. The valuation allowances, related to the uncertainty of realizing tax benefits primarily for tax credits, net capital and operating loss

carryforwards

related to certain of the Company’s subsidiaries. As of September 30, 2019, the Company had tax credits, net capital and operating loss

carryforwards

of $

797,091

of which $

244,711

have expiration dates

through 2039

, and the remainder do not expire.

The aggregate changes in the balance of the Company’s gross unrecognized tax benefits were as

follows


	Year Ended September 30,
	2020			2019			2018
Balance at beginning of fiscal year	$	169,322		$	187,646		$	193,024
Additions based on tax positions related to the current year		23,154			19,530			20,329
Additions for tax positions of prior years		23,292			27,558			6,743
Reductions for tax positions of prior years		(15,214	)		(2,578	)		(10,548	)
Settlements with tax authorities(1)		(29,400	)		(37,672	)		(3,880	)
Lapse of statute of limitations		(2,968	)		(25,162	)		(18,022	)

Balance at end of fiscal year	$	168,186		$	169,322		$	187,646

(1)	The changes in the year ended September 30, 2020, in the balance of the Company’s gross unrecognized tax benefits that relate to settlements with tax authorities is $29,400, the majority of which was offset by income tax payments and increase in Tax Payables and Deferred Tax Liabilities.

The total amount of unrecognized tax benefits, which includes interest and penalties, was $168,186 as of September 30, 2020, and $169,322 as of September 30, 2019, all of which would affect the effective tax rate if realized.

The Company recognizes interest and penalties related to unrecognized tax benefits in the provision for income taxes. As of September 30, 2020, the Company had accrued $15,812

in income taxes payable for interest and penalties relating to unrecognized tax benefits. Total amount of interest and penalty releases, net that was recognized in the statements of income in fiscal year 2020 was $15,396. As of September 30, 2019, the Company had accrued

$31,108 in income taxes payable for interest and penalties relating to unrecognized tax benefits, of which a benefit of $4,679 was recognized in the statements of income in fiscal year 2019, net of interest and penalty reversals.

The Company is currently under tax audit in several jurisdictions for the tax years 2007 and onwards. Timing of the resolution of audits is highly uncertain and therefore, as of September 30, 2020, the Company cannot estimate the change in unrecognized tax benefits resulting from these audits within the next 12 months.

It is reasonably possible that the amount of unrecognized tax benefits may decrease by up to $15,446

during fiscal year 2021 as a result of lapse of statutes of limitations in jurisdictions in which the Company

operates

Accrued expenses and Other Current Liabilities [Abstract]

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References + Details

Repurchase of Shares	12 Months Ended
Repurchase of Shares	Sep. 30, 2020
Equity [Abstract]
Repurchase of Shares	Note 12 — Repurchase of Shares From time to time, the Company’s Board of Directors can adopt share repurchase plans authorizing the repurchase of the Company’s outstanding ordinary shares. On November 8, 2017, the Company’s Board of Directors adopted a share repurchase plan for the repurchase of up to an additional $800,000 of the Company’s outstanding ordinary shares with no expiration date. On November 12, 2019, the Company’s Board of Directors adopted another share repurchase plan authorizing the repurchase of up to an additional $800,000 of the Company’s outstanding ordinary shares with no expiration date. In May 2020, the Company completed the repurchase of the remaining authorized amount of ordinary shares under the November 2017 plan and initiated repurchases of the Company’s outstanding ordinary shares pursuant to the November 2019 plan. In the year ended September 30, 2020, the Company repurchased 5,668 ordinary shares at an average price of $63.66 per share (excluding broker and transaction fees). The November 2019 plan permits the Company to purchase its ordinary shares in the open market or through privately negotiated transactions at times and prices that it considers appropriate. As of September 30, 2020, the Company had remaining authority to repurchase up to $678,344 of its outstanding ordinary shares under the November 2019 plan.

Financing Arrangements	12 Months Ended
Financing Arrangements	Sep. 30, 2020
Debt Disclosure [Abstract]
Financing Arrangements	Note 13 — Financing Arrangements In December 2011, the Company entered into the unsecured $500,000 five-year revolving credit facility with a syndicate of banks (the “Revolving Credit Facility”). In December 2014, the Revolving Credit Facility was amended and restated to, among other things, extend the maturity date of the facility to December 2019. In December 2017, the Revolving Credit Facility was amended and restated again to, among other things, extend the maturity date of the facility to December 2022. In March 2020, the Company drew an aggregate of $300,000 under the Revolving Credit Facility and repaid it in full in June 2020 in connection with the issuance of our Senior Notes. As of September 30, 2020, the Company was in compliance with the financial covenants and had no outstanding borrowings under the Revolving Credit Facility. In addition, unassociated with the Revolving Credit Facility discussed above, in the second quarter of fiscal year 2020, the Company entered into a $50,000 short-term loan and repaid it in full in June 2020 in connection with the issuance of our Senior Notes. In May 2020 the Company entered into an additional $ 100,000 short-term loan which remained outstanding as of September 30, 2020. In June 2020, the Company issued an aggregate principal amount of $650,000 in Senior Notes that will mature in June 2030 and bear interest at a fixed rate of 2.538 percent per annum (the “Senior Notes”). The interest is payable semi-annually in June and December of each year, commencing in December 2020. The Company incurred issuance costs of $6,121 in relation with the Senior Notes which are being amortized to interest expenses over the term of the Senior Notes using the effective interest rate. The Senior Notes are senior unsecured obligations of the Company and rank equally in right of payment with all existing and future senior indebtedness of the Company, including any indebtedness the Company may incur from time to time under the Revolving Credit Facility. The total interest expenses recognized in connection of the Senior Notes for the year ended September 30, 2020 were $ 4,562. The accrued interest on the Senior Notes is included in accrued expenses and other current liabilities and was $ 4,418 as of September 30, 2020. As of September 30, 2020, the noncurrent outstanding principal portion was $650,000. The total estimated fair value of the Senior Notes as of September 30, 2020 was $ 674,512 . The fair value was determined based on the closing trading price of Senior Notes as of September 30, 2020 and is deemed a Level 2 liability within the fair value measurement framework. As of September 30, 2020, the Company had additional uncommitted lines of credit available for general corporate and other specific purposes and had outstanding letters of credit and bank guarantees from various banks totaling $93,554. These were supported by a combination of the uncommitted lines of credit that the Company maintains with various banks.

Accrued Expenses and Other Current Liabilities

12 Months Ended

Sep. 30, 2020

Accrued Expenses and Other Current Liabilities

Note 14 — Accrued Expenses and Other Current Liabilities

Accrued expenses and other

urrent liabilities consist of the following:


	As of September 30,
	2020		2019
Ongoing accrued expenses	$	217,133	$	259,661
Project-related provisions		121,658		140,701
Taxes payable		25,739		28,335
Dividends payable(1)		43,084		38,413
Derivative instruments(2)		4,902		5,053
Other		181,092		175,494

	$	593,608	$	647,657

(1)	The amounts payable as a result of the August 5, 2020 and the August 7, 2019 dividend declarations. See Note 20 to the consolidated financial statements.

(2)	Includes derivatives that are designated as hedging instruments and derivatives that are not designated as hedging instruments. See Note 7 to the consolidated financial statements.

Interest and other expense, net

12 Months Ended

Sep. 30, 2020

Other Income and Expenses [Abstract]

Interest and other expense, net

Note 15 — Interest and other expense, net

Interest and other expen

e, net, consists of the following:


	Year Ended September 30,
	2020			2019			2018
Interest income	$	(4,233	)	$	(6,225	)	$	(6,602	)
Interest expense(1)		10,427			3,911			2,764
Foreign exchange loss		3,382			7,860			6,173
Other, net		1,860			(3,687	)		4,431

	$	11,436		$	1,859		$	6,766

(1)	For further details, see Note 13 to the consolidated financial statements.

Leases

12 Months Ended

Sep. 30, 2020

Leases [Abstract]

Leases

Note 16 — Leases

As discussed in Note 2, the Company adopted ASU

No. 2016-02,

“Leases”,

the operating lease expense is recorded on a straight-line basis over the lease term.

Lease costs were as follows


	Year ended September 30, 2020
Total net lease cost(*)	$	91,025

(*)	Variable lease cost is immaterial

Supplemental information related to operating lease transactions was as follows:


	Year ended September 30, 2020
Lease liability payments	$	88,272
Lease assets obtained in exchange for liabilities	$	87,820


	As of September 30, 2020
Weighted average remaining lease term — Operating leases		6.8 Years
Weighted average discount rate — Operating leases		3.5	%

The following maturity analysis presents future undiscounted cash outflows for operating leases as of September 30, 2020


For the year ended September 30,
2021	$	70,485
2022		63,315
2023		41,799
2024		33,343
2025		28,088
Thereafter		107,216
Total lease payments	$	344,246
Less: imputed interest		(55,070	)

Present value of lease liabilities	$	289,176

Future minimum rental commitments under

non-cancelable

operating leases as of September 30, 2019, which were accounted for per prior lease accounting (ASC 840), were as follows:


For the year ended September 30,
2020	$	69,043
2021		60,544
2022		51,863
2023		31,951
2024		24,350
Thereafter		93,845

	$	331,596

As of September 30, 2020, the Company had no material finance leases.

Rent

expense per prior lease accounting (ASC 840), net of sublease income was

approximately

$65,692 and $63,603 for fiscal years 2019

and

2018,

respectivel

Contingencies and Commitments	12 Months Ended
Contingencies and Commitments	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Commitments	Note 17 — Contingencies and Commitments Legal Proceedings The Company is involved in various legal claims and proceedings arising in the normal course of its business. The Company accrues for a loss contingency when it determines that it is probable, after consultation with counsel, that a liability has been incurred and the amount of such loss can be reasonably estimated. At this time, the Company believes that the results of any such contingencies, either individually or in the aggregate, will not have a material adverse effect on the Company’s financial position, results of operations or cash flows. Between 2014 and 2018, the Company defended a lawsuit against certain of its subsidiaries in the U.S. District Court in Oregon alleging breach of contract and trade secret misappropriation. In October 2018, while continuing to deny the plaintiff’s allegations, the Company entered into a settlement agreement with the plaintiff, which included a $ 50,000 settlement payment by the Company, in consideration for a mutual release of each party and its respective customers with no admission of liability or fault. As a result of the settlement, the lawsuit was dismissed with prejudice on November 13, 2018 . During fiscal year 2019 the Company paid the settlement amount of $ 50,000 and $ 5,000 in legal and other fees which were accrued as of September 30, 2018 . Certain of the Company’s subsidiaries are currently in a dispute with a state-owned telecom enterprise in Ecuador, which appears to have political aspects. The Company’s counterparty has claimed monetary damages. The dispute is over contracts, under which the Company was providing certain services, which have been terminated by the counterparty in connection with such dispute and which are under scrutiny by certain local governmental authorities. The Company believes it has solid arguments and is vigorously defending its rights. To date, however, the Ecuadorian Courts have responded to such defense efforts, including motions alleging constitutional defects, in an inconsistent manner. While we have achieved some successes, the majority of the procedures are still ongoing. The Company is unable to reasonably estimate the ultimate outcome of the above dispute. Guarantor’s Accounting and Disclosure Requirements for Guarantees In t he ordinary course of its business, the Company provides certain customers with financial performance guarantees which, in certain cases, are backed by lines of credit. The Company is only liable for the amounts of those guarantees in the event of the Company’s nonperformance, which would permit the customer to exercise the guarantee. The Company generally offers its products with a limited warranty. The Company’s policy is to accrue for warranty costs, if needed, based on historical trends in product failure. Based on the Company’s experience, only minimal warranty charges have been incurred after revenue was fully recognized and, as a result, the Company did not accrue any amounts for product warranty liability during fiscal years 2020, 2019 and 2018. The Company generally indemnifies i ts customers against claims made by third parties arising from the use of the Company’s software and certain other matters. To date, the Company has incurred and recorded immaterial costs as a result of such obligations in its consolidated financial statements.

Employee Benefits	12 Months Ended
Employee Benefits	Sep. 30, 2020
Retirement Benefits [Abstract]
Employee Benefits	Note 18 — Employee Benefits The C o mpany accrues severance pay mainly for the employees of its Israeli operations in accordance with Israeli law and certain employment procedures on the basis of the latest monthly salary paid to these employees and the length of time that they have worked for the Israeli operations. The severance pay liability amounted to $ 270,985 and $ 266,209 as of September 30, 2020 and 2019, respectively, and is included as accrued employee costs in other noncurrent liabilities. This liability is partially funded by amounts on deposit with insurance companies that totaled $ 211,566 and $ 206,752 as of September 30, 2020 and 2019, respectively, and are included in other noncurrent assets. The accrued severance expenses were $ 33,354 , $ 33,355 and $ 28,472 for fiscal years 2020, 2019 and 2018, respectively. The Company sponsors defined contribution plans covering certain of its employees around the world. The plans primarily provide for Company matching contributions based upon a percentage of the employees’ contributions. The Company’s contributions in fiscal years 2020, 2019 and 2018 under such plans were not material compared to total operating expenses. The Company maintains non-contributory defined benefit plans that provide for pension, other retirement and post-employment benefits for certain employees of a Canadian subsidiary based on length of service and rate of pay. The Company accrues its obligations to these employees under employee benefit plans and the related costs net of returns on plan assets. Pension expense and other retirement benefits earned by employees are actuarially determined using the projected benefit method pro-rated on service and based on management’s best estimates of expected plan investments performance, salary escalation, retirement ages of employees, discount rate, inflation and expected health care costs. The fair value of the employee benefit plans’ assets is based on market values. The plan assets are valued at market value for the purpose of calculating the expected return on plan assets and the amortization of experienced gains and losses. The Company recognized the funded status of such plans in the balance sheet. The pension and other benefits costs related to the non-contributory defined benefit plans were immaterial in fiscal years 2020, 2019 and 2018.

The entire disclosure for retirement benefits.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Disclosure of Stock Option and Incentive Plan [Abstract]

Stock Option and Incentive Plan

12 Months Ended

Sep. 30, 2020

Stock Option and Incentive Plan

Note 19 — Stock Option and Incentive Plan

Janu

ry 1998, the Company adopted the 1998 Stock Option and Incentive Plan, or Equity Incentive Plan, which provides for the grant of restricted stock awards, stock options and other equity-based awards to employees, officers, directors, and consultants. Since its adoption, the Equity Incentive Plan has been amended on several occasions to, among other things, increase the number of ordinary shares issuable under the Equity Incentive Plan. In January 2017, the maximum number of ordinary shares authorized by the Company’s Board of Directors to be granted under the Equity Incentive Plan was increased from 62,300 to 67,550.

In January 2020, the maximum number of ordinary shares authorized to be granted under the Equity Incentive Plan was increased from 67,550 to 70,550.

Awards granted under the Equity Incentive Plan generally vest over a period of three to four years

subject to service based conditions or a combination of service and performance based conditions and

stock options

have a term of ten years. Also, in accordance with the Equity Incentive Plan, options are issued at or above the market price at the

time of the grant.

The following table summarizes information about options to purchase the Company

’

s ordinary shares, as well as changes during the fiscal year ended September 30, 2020:


	Number of Share Options			Weighted Average Exercise Price
Outstanding as of October 1, 2019		6,837		$	56.65
Granted		1,133			69.53
Exercised		(1,871	)		52.28
Forfeited		(383	)		62.33

Outstanding as of September 30, 2020(1)		5,716		$	60.26

Exercisable as of September 30, 2020(1)		2,401		$	54.72

(1)	As of September 30, 2020, the weighted average remaining contractual life of outstanding and exercisable options was 7.16 and 5.68 years, respectively.

The following table summarizes information relating to awards of restricted shares, as well as changes during the fiscal year ended September 30, 2020:


	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding as of October 1, 2019		937		$	61.70
Granted		659			70.03
Vested		(425	)		61.72
Forfeited		(74	)		63.61

Outstanding as of September 30, 2020		1,097		$	66.57

The total intrinsic value of options exercised during fiscal years 2020, 2019 and 2018 was $31,220, $13,081 and $38,025, respectively.

The value of restricted shares vested during fiscal years 2020, 2019 and 2018 was $28,727, $28,430 and $35,801, respectively.

The aggregate intrinsic value of outstanding and exercisable stock options as of September 30, 2020 was $14,064 and $12,938, respectively.

Employee equity-based compensation

pre-tax

expense for the years ended September 30, 2020, 2019 and 2018 was as follows:


	Year Ended September 30,
	2020		2019		2018
Cost of revenue	$	20,005	$	19,879	$	18,253
Research and development		3,058		2,714		3,476
Selling, general and administrative		19,371		15,957		25,747

Total	$	42,434	$	38,550	$	47,476

The fair value of options granted was estimated on the

ate of grant using the Black-Scholes pricing model with the assumptions noted in the following table (all in weighted averages for options granted during the year):


	Year Ended September 30,
	2020			2019			2018
Risk-free interest rate(1)		1.41	%		2.64	%		2.30	%
Expected life of stock options(2)		4.50			4.50			4.50
Expected volatility(3)		17.3	%		17.8	%		15.0	%
Expected dividend yield(4)		1.75	%		1.82	%		1.51	%
Fair value per option	$	8.85		$	9.13		$	8.70

(1)	Risk-free interest rate is based upon U.S. Treasury yield curve appropriate for the term of the Company’s employee stock options.

(2)	Expected life of stock options is based upon historical experience.

(3)	Expected volatility is based on blended volatility.

(4)	Expected dividend yield is based on the Company’s history and future expectation of dividend payouts.

Dividends

12 Months Ended

Sep. 30, 2020

Other Liabilities Disclosure [Abstract]

Dividends

Note 20 — Dividends

The Company’s Board of Directors declared the following dividends during the fiscal years ended September 30, 2020, 2019 and 2018:


Declaration Date	Dividends Per Ordinary Share		Record Date		Total Amount		Payment Date

August 5, 2020	$	0.3275		September 30, 2020	$	43,084		October 23, 2020
May 7, 2020	$	0.3275		June 30, 2020	$	43,568		July 24, 2020
February 4, 2020	$	0.3275		March 31, 2020	$	43,723		April 24, 2020
November 12, 2019	$	0.285		December 31, 2019	$	38,357		January 24, 2020


August 7, 2019	$	0.285		September 30, 2019	$	38,413		October 25, 2019
May 14, 2019	$	0.285		June 28, 2019	$	38,730		July 19, 2019
February 5, 2019	$	0.285		March 29, 2019	$	39,084		April 19, 2019
November 8, 2018	$	0.250		December 31, 2018	$	34,755		January 18, 2019


July 31, 2018	$	0.250		September 28, 2018	$	35,046		October 19, 2018
May 10, 2018	$	0.250		June 29, 2018	$	35,363		July 20, 2018
January 30, 2018	$	0.250		March 30, 2018	$	35,637		April 20, 2018
November 8, 2017	$	0.220		December 29, 2017	$	31,556		January 19, 2018

The amounts payable as a result of the August 5, 2020, August 7, 2019 and July 31, 2018 declarations were included in accrued expenses and other current liabilities as of September 30, 2020, 2019 and 2018, respectively.

On November 10, 2020, the Company’s Board of Directors approved quarterly dividend payment of $0.3275 per share, and set December 31, 2020 as the record date for determining the shareholders entitled to receive the dividend, which is payable on January 22, 2021.

On November 10, 2020, the Company’s Board

of Directors also approved, subject to shareholder

approval at the January 2021

annual general meeting of shareholders, an increase in the quarterly cash dividend to $

0.36

per share, anticipated to be paid in

April 2021

Earnings Per Share

12 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

Note 21 — Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:


	Year Ended September 30,
	2020			2019			2018
Numerator:
Net income	$	497,840		$	479,446		$	354,396
Net income and dividends attributable to participating restricted shares		(3,663	)		(3,295	)		(2,650	)

Numerator for basic earnings per common share	$	494,177		$	476,151		$	351,746

Undistributed income allocated to participating restricted shares		2,417			2,252			1,617
Undistributed income reallocated to participating restricted shares		(2,406	)		(2,240	)		(1,603	)

Numerator for diluted earnings per common share	$	494,188		$	476,163		$	351,760

Denominator:
Weighted average number of shares outstanding — basic		133,590			137,418			142,422
Weighted average number of participating restricted shares		(983	)		(944	)		(1,065	)

Weighted average number of common shares — basic		132,607			136,474			141,357

Effect of dilutive stock options granted		642			691			1,282
Weighted average number of common shares — diluted		133,249			137,165			142,639

Basic earnings per common share	$	3.73		$	3.49		$	2.49

Diluted earnings per common share	$	3.71		$	3.47		$	2.47

For the fiscal years ended September 30, 2020, 2019 and 2018, 2,634, 3,547 and 1,357 shares, respectively, on a weighted average basis, were attributable to antidilutive outstanding stock options and therefore were not included in the calculation of diluted earnings per share.

Segment Information and Sales to Significant Customers

12 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Segment Information and Sales to Significant Customers

Note 22 — Segment Information and Sales to Significant Customers

The Company and its subsidiaries operate in one operating segment, providing software products and services for the communications, entertainment and media industry service providers.

Geographic Information

The following is a summary of revenue and long-lived assets by geographic area. Revenue is attributed to geographic region based on the location of the customers.


	Year Ended September 30,
	2020		2019		2018
Revenue
North America (mainly United States)	$	2,720,911	$	2,582,719	$	2,550,234
Europe		613,751		598,731		572,196
Rest of the world		834,377		905,219		852,407

Total	$	4,169,039	$	4,086,669	$	3,974,837


	As of September 30,
	2020		2019
Long-lived Assets(1)
Europe	$	211,292	$	206,086
North America		104,918		95,876
Rest of the world:
Israel ( 2)		237,561		168,493
India		38,706		36,546
Others		15,474		18,313

Total	$	607,951	$	525,314

(1)	Property and equipment, net.

(2)	For more details, see also note 2.

Revenue by nature of activities


	Year Ended September 30,
	2020		2019		2018
Managed services arrangements	$	2,398,691	$	2,246,279	$	2,051,589
Others		1,770,348		1,840,390		1,923,248

Total	$	4,169,039	$	4,086,669	$	3,974,837

Sales to Significant Customers

The following table summarizes the percentage of sales to significant customer groups which accounted for at least ten percent of its total revenue in each of fiscal years 2020, 2019 and 2018.


	Year Ended September 30,
	2020			2019			2018
Revenue
Customer 1		25.8	%		23.4	%		27.3	%

Customer 2		12.1	%		*			*

*	Represents an amount of less than 10%.

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Results of Operations (Unaudited)

12 Months Ended

Sep. 30, 2020

Selected Quarterly Results of Operations (Unaudited)

Note 23 — Selected Quarterly Results of Operations (Unaudited)

The following are details of the unaudited quarterly results of operations for the three months ended:


	September 30,		June 30,		March 31,		December 31,
2020
Revenue	$	1,052,948	$	1,026,201	$	1,047,933	$	1,041,957
Operating income		146,938		147,531		156,712		143,577
Net income		134,463		120,407		127,038		115,932
Basic earnings per share		1.02		0.90		0.95		0.86
Diluted earnings per share		1.01		0.90		0.94		0.85
2019
Revenue	$	1,030,253	$	1,024,704	$	1,019,657	$	1,012,055
Operating income		144,154		142,320		150,175		133,097
Net income		122,027		131,448		124,279		101,692
Basic earnings per share		0.90		0.96		0.90		0.73
Diluted earnings per share		0.90		0.96		0.90		0.72

Subsequent event	12 Months Ended
Subsequent event	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent event	Note 24 — Subsequent event On November 10, 2020, the Company signed an agreement for the divestiture of OpenMarket for approximately $300,000 cash with Infobip, a company in which One Equity Partners is the primary institutional investor, and expects to complete the divestiture within the next few months. With this transaction, Amdocs is divesting a non-strategic asset in the mobile messaging domain and remaining laser-focused on its core strategic growth initiatives.

Valuation and Qualifying Accounts

12 Months Ended

Sep. 30, 2020

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

VALUATION AND QUALIFYING ACCOUNTS

(In thousands)


	Accounts Receivable Allowances			Valuation Allowances on Net Deferred Tax Assets
Balance as of September 30, 2017	$	28,726		$	94,573
Charged to costs and expenses		6,134			18,173
Charged to other accounts		1,226			6,121	(1)
Deductions		(14,875	)(2)		(6,140	)

Balance as of September 30, 2018		21,211			112,727
Charged to costs and expenses		22,260			1,009
Charged to other accounts		2,406			6,008	(1)
Deductions		(9,756	)(4)		(34,211	)(3)

Balance as of September 30, 2019		36,121			85,533
Charged to costs and expenses		18,465			8,521
Charged to other accounts		(3,523	)		1,005	(1)
Deductions		(27,644	)(6)		(25,604	)(5)

Balance as of September 30, 2020	$	23,419		$	69,455

(1)	Includes valuation allowances on deferred tax assets incurred in connection with an acquisition.

(2)	$6,659 of accounts receivable allowances were written off against the related accounts receivables, and the remaining deductions in the accounts receivable allowances were released to earnings.

(3)	$7,588 of valuation allowances on deferred tax assets were written off against the related deferred tax assets, and the remaining deductions in the valuation allowances on net deferred tax assets were released to earnings.

(4)	$3,539 of accounts receivable allowances were written off against the related accounts receivables, and the remaining deductions in the accounts receivable allowances were released to earnings.

(5)	$2,283 of valuation allowances on deferred tax assets were written off against the related deferred tax assets, and the remaining deductions in the valuation allowances on net deferred tax assets were released to earnings.

(6)	$4,969 of accounts receivable allowances were written off against the related accounts receivables, $7,089 were written off against deferred revenue and the remaining deductions in the accounts receivable allowances were released to earnings .

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Basis of Presentation

The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles, or GAAP and are denominated in U.S. dollars.

Consolidation

non-controlling

interests. The Company is obligated to distribute in the future the new entity’s earnings under certain conditions, in fiscal years 2020

2019

and 201

the new entity had negligible earnings or losses and, therefore, an immaterial effect on consolidated financial statements of Amdocs Limited.

Use of Estimates

Reclassifications

From time to time, certain immaterial amounts in prior year financial statements may be reclassified to conform to the current year presentation.

Functional Currency

Cash and Cash Equivalents

Cash and cash equivalents consist of cash and interest-bearing investments with insignificant interest rate risk and maturities from acquisition date of 90 days or less.

Accounts Receivable Factoring

From time to time, the Company uses

non-recourse

factoring arrangements, to sell accounts receivable to third-party financial institutions. The sale of the receivables in these arrangements are accounted for as a true sale.

Investments

The Company classifies all of its short-term interest-bearing investments as

available-for-sale

first-in-first-out

(FIFO) method for determining the cost of securities.

Property and Equipment

Leases

As discussed below under “

Adoption of New Accounting Standards”

, the Company adopted ASU

No. 2016-02,

“Leases”.

non-cancelable

or cancelable only by the payment of penalties.

Goodwill, Intangible Assets and Long-Lived Assets

two-step

Comprehensive Income

Comprehensive income, net of related taxes where applicable, includes, in addition to net income:

(i) net change in fair value of

available-for-sale

securities;

(ii) net change in fair value of cash flow hedges; and

(iii) net actuarial gains and losses on defined benefit plans.

Treasury Stock

Business Combinations

earn-out

which is not considered a contingent consideration is recognized as compensation expense over expected service period.

in-process

build-up

approach. The cost

build-up

approach determines fair value by estimating the costs related to fulfilling the obligations plus a normal profit margin.

Income Taxes

to the consolidated financial statements.

Revenue Recognition

Revenue Recognition for projects

Revenue Recognition for subsequent license fee

Revenue Recognition for term-based license and perpetual license

— Revenue related to software solutions that do not require significant customization, implementation and modification are recognized upon delivery.

Revenue Recognition for maintenance

— Maintenance revenue is recognized ratably over the term of the maintenance agreement.

Revenue Recognition for ongoing services

Revenue Recognition for managed services arrangement

— Managed services arrangements include management of data center operations and IT infrastructure, application management and ongoing support, management of

end-to-end

business processes, and managed transformation that includes both a transformation project as well as taking over managed services responsibility.

Revenue Recognition for third-party hardware and software

Arrangements with Multiple Performance Obligations

Accounts Receivable — Billed

— Billed accounts receivables include all outstanding invoices to customers, as well as amounts allowed to be billed according to contractual billing terms with customers.

Accounts Receivable — Unbilled

Deferred Revenue

Assets Recognized from the Costs to Obtain a Contract with a Customer

— Incremental costs of obtaining a contract (e.g., sales commissions) are capitalized and amortized on a

pro-rata

Cost of Revenue

Research and Development

Equity-Based Compensation

Concentrations of Credit Risk

Earnings per Share

non-forfeitable

rights to dividends or dividend equivalents) in the computation of earnings per share

ursuant to the

two-class

method, which calculates earnings per share for common shares and participating securities.

Derivatives and Hedging

Recent Accounting Standards

In March 2020, the Financial Accounting Standards Board, or FASB, issued Accounting Standard Update, or ASU

No. 2020-04:

“

Reference Rate Reform: Facilitation of the Effects of Reference Rate Reform on Financial

Reporting”.

In December 2019, the FASB issued Accounting Standard Update, or ASU

No. 2019-12:

“

Simplifying the Accounting for Income Taxes

In November 2018, the FASB, issued ASU

No. 2018-18

, “Collaborative Arrangements

In August 2018, the FASB issued ASU

No. 2018-15

, “Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract”.

internal-use

In August 2018, the FASB issued ASU

No. 2018-13

, “Fair Value Measurement”.

In August 2018, the FASB issued ASU

No. 2018-14,

“

Changes to the Disclosure Requirements for Defined Benefit Plans”

In August 2017, the FASB issued ASU

No. 2017-12,

“

Targeted Improvements to Accounting for Hedging Activities

”

. The ASU amends existing guidance to simplify the application of hedge accounting in certain

In January 2017, the FASB, issued an Accounting Standard Update, or ASU

No. 2017-04,

“Simplifying the Test for Goodwill Impairment”

Adoption of New Accounting Standards

In February 2016, the FASB issued ASU

No. 2016-02,

“Leases”

non-lease

components from lease components and instead to account for each separate lease component and the

non-lease

The impact of adopting this ASU on the Company’s Consolidated

Balance

Sheets

was as

follows


	Balance as of September 30, 2019			Adjustments due to ASC 842			Balance as of October 1, 2019
Balance Sheet:
Prepaid expenses and other current assets	$	216,084		$	(6,697	)	$	209,387
Lease assets		—			281,785			281,785
Other noncurrent assets		423,941			(2,755	)		421,186
Accrued expenses and other current liabilities		(647,657	)		3,553			(644,104	)
Lease liabilities (current)		—			(63,351	)		(63,351	)
Lease liabilities (non-current)		—			(221,050	)		(221,050	)
Other noncurrent liabilities		(334,922	)		8,515			(326,407	)

See Note 16 to the consolidated financial statements for further details.

In June 2018, the FASB issued ASU

No. 2018-07,

“

Improvements to Nonemployee Share-Based Payment Accounting

”

. The ASU aligns the measurement and classification for share-based payments to

nonemployees

statements

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Summary of Impact of Adoption of ASC 842 on Consolidated Balance Sheet

The impact of adopting this ASU on the Company’s Consolidated

Balance

Sheets

was as

follows


	Balance as of September 30, 2019			Adjustments due to ASC 842			Balance as of October 1, 2019
Balance Sheet:
Prepaid expenses and other current assets	$	216,084		$	(6,697	)	$	209,387
Lease assets		—			281,785			281,785
Other noncurrent assets		423,941			(2,755	)		421,186
Accrued expenses and other current liabilities		(647,657	)		3,553			(644,104	)
Lease liabilities (current)		—			(63,351	)		(63,351	)
Lease liabilities (non-current)		—			(221,050	)		(221,050	)
Other noncurrent liabilities		(334,922	)		8,515			(326,407	)

Revenue (Tables)

12 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Summary of Accounts Receivable and Deferred Revenue

The following table provides information a

out Accounts receivable, both billed and unbilled and deferred revenue:


	As of
	September 30, 2020			September 30, 2019
Accounts receivable — billed (net of allowances for doubtful accounts of $23,419 and $36,121 as of September 30, 2020 and 2019, respectively)	$	685,485		$	760,797
Accounts receivable — unbilled (current)	$	175,548		$	227,061
Accounts receivable — unbilled (non-current)	$	42,089		$	16,987

Total Accounts receivable — unbilled	$	217,637		$	244,048
Deferred revenue (current)	$	(126,841	)	$	(118,182	)
Deferred revenue (non-current)	$	(16,529	)	$	(23,785	)

Total Deferred revenue	$	(143,370	)	$	(141,967	)

Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurement on Company's Assets and Liabilities

The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of September 30, 2020 and 2019:


	As of September 30, 2020
	Level 1		Level 2		Level 3			Total
Available-for-sale securities:
Money market funds	$	558,633	$	—	$	—		$	558,633
Corporate bonds		—		752		—			752

Total available-for-sale securities		558,633		752		—			559,385

Equity Investments		—		—		24,211			24,211
Derivative financial instruments, net		—		20,636		—			20,636

Other liabilities		—		—		(19,641	)		(19,641	)

Total	$	558,633	$	21,388	$	4,570		$	584,591


	As of September 30, 2019
	Level 1		Level 2		Level 3			Total
Available-for-sale securities:
Money market funds	$	69,370	$	—	$	—		$	69,370

Total available-for-sale securities		69,370		—		—			69,370

Equity Investments		—		—		18,008			18,008
Derivative financial instruments, net		—		7,890		—			7,890

Other liabilities		—		—		(29,805	)		(29,805	)

Total	$	69,370	$	7,890	$	(11,797	)	$	65,463

Available-For-Sale Securities (Tables)

12 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Interest-Bearing Investments in Available-for-Sale Securities

Available-for-sale

securities consist of the following interest-bearing

investments


	As of September 30, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	558,633	$	—	$	—	$	558,633
Corporate bonds		754		—		2		752

Total(1)	$	559,387	$	—	$	2	$	559,385

(1)

Available-for-sale

securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and

available-for-sale


	As of September 30, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Money market funds	$	69,370	$	—	$	—	$	69,370

Total(1)	$	69,370	$	—	$	—	$	69,370

(1)

Available-for-sale

securities with maturities longer than 90 days from the date of acquisition were classified as short-term interest-bearing investments and

available-for-sale

securities with maturities of 90 days or less from the date of acquisition were included in cash and cash equivalents on the Company’s balance sheet. As of

September

30, 2019, all the securities were classified as cash and cash

equivalents

Available-for-Sale Securities Debt Maturities Market Value

As of September 30, 2020, the Company’s

available-for-sale

securities had the following maturity dates:


	Market Value
Due within one year	$	558,633
1 to 2 years		—
2 to 3 years		752
3 to 4 years		—
Thereafter		—

	$	559,385

Derivative Financial Instruments (Tables)

12 Months Ended

Sep. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional Amounts of Derivative Instruments


	Notional Value*
Foreign exchange contracts	$	1,220,000

(*)	Gross notional amounts do not quantify risk or represent assets or liabilities of the Company but are used in the calculation of settlements under the contracts.

Fair Value of Open Foreign Currency Exchange Contracts

The fair value of the open foreign exchange contracts recorded as an asset or a liability by the Company on its consolidated balance sheets as of September 30, 2020 and September 30, 2019, is as follows:


	As of September 30,
	2020			2019
Derivatives designated as hedging instruments
Prepaid expenses and other current assets	$	21,153		$	9,344
Other noncurrent assets		1,317			585
Accrued expenses and other current liabilities		(2,089	)		(2,977	)
Other noncurrent liabilities		—			(2,072	)

		20,381			4,880
Derivatives not designated as hedging instruments
Prepaid expenses and other current assets		3,068			5,086
Accrued expenses and other current liabilities		(2,813	)		(2,076	)

		255			3,010

Net fair value	$	20,636		$	7,890

Effect of Cash Flow Hedging Instruments


	Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion) Year Ended September 30,
	2020		2019			2018
Line item in consolidated statements of income:
Revenue	$	834	$	19		$	(1,129	)
Cost of revenue		4,166		(8,627	)		15,877
Research and development		1,646		(2,059	)		3,127
Selling, general and administrative		2,500		(2,309	)		3,462

Total	$	9,146	$	(12,976	)	$	21,337

Changes in Net Unrealized Gains (Losses) on Cash Flow Hedges

The activity related to the changes in net unrealized gains (losses) on cash flow hedges recorded in accumulated other comprehensive income (loss), net of tax, is as follows:


	Year Ended September 30,
	2020			2019			2018
Net unrealized gain (loss) on cash flow hedges, net of tax, beginning of period	$	3,945		$	(26,608	)	$	24,508
Changes in fair value of cash flow hedges, net of tax		21,903			19,228			(31,908	)
Reclassification of (gain) loss into earnings, net of tax		(7,012	)		11,325			(19,208	)

Net unrealized gain (loss) on cash flow hedges, net of tax, end of period	$	18,836		$	3,945		$	(26,608	)

Effect of Non-Designated as Hedging Instruments

The effect of the Company’s derivative instruments not designated as hedging instruments in the consolidated statements of income for the fiscal years ended September 30, 2020, 2019 and 2018,

respectively, which partially offsets the foreign currency impact from the underlying exposure, is summarized as follows:


	(Losses) Gains Recognized in Income Year Ended September 30,
	2020			2019			2018
Line item in statements of income:
Cost of revenue	$	(718	)	$	401		$	(4,577	)
Research and development		(341	)		14			(736	)
Selling, general and administrative		(559	)		294			(950	)
Interest and other expense, net		255			5,845			7,038
Income taxes		(679	)		(528	)		1,581

Total	$	(2,042	)	$	6,026		$	2,356

Property and Equipment, Net (Tables)

12 Months Ended

Sep. 30, 2020

Property, Plant and Equipment [Abstract]

Components of Property and Equipment, Net

The components of property and equipment, net are:


	As of September 30,
	2020			2019
Computers, related equipment and software	$	1,163,807		$	1,109,465
Building and land(1)		177,255			109,446
Leasehold improvements		234,777			230,817
Furniture, fixtures and other		51,831			47,813

Property and equipment, gross		1,627,670			1,497,541
Less accumulated depreciation		(1,019,719	)		(972,227	)

Property and equipment, net	$	607,951		$	525,314

(1)	For more details, see also note 2.

Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Details of Total Goodwill

The following table presents details of the Company’s total goodwill:


As of September 30, 2018	$	2,444,895
Goodwill resulting from acquisitions(1)		17,484
Other		456

As of September 30, 2019	$	2,462,835
Goodwill resulting from acquisitions(2)		118,628
Other		(2,818	)

As of September 30, 2020	$	2,578,645

(1)	Mainly relates to the acquisition of TTS. In allocating the total purchase price for T TS , based on estimated fair values, the Company recorded $8,218 of goodwill, $29,500 of customer relationships to be amortized over approximately six years, $2,100 of core technology to be amortized over approximately six years and $1,300 of trade mark to be amortized over four years.

(2)

Mainly relates to the acquisition of Openet. In allocating the total preliminary purchase price for Openet, based on estimated fair values, the Company recorded

Details Regarding Total Definite-Lived Purchased Intangible Assets

The following table presents details regarding the Company’s total definite-lived purchased intangible assets:


	Gross		Accumulated Amortization			Net
September 30, 2020
Core technology	$	896,814	$	(735,534	)	$	161,280
Customer relationships		642,575		(517,670	)		124,905
Other		47,540		(37,391	)		10,149

Total	$	1,586,929	$	(1,290,595	)	$	296,334

September 30, 2019
Core technology	$	775,479	$	(690,961	)	$	84,518
Customer relationships		594,555		(483,313	)		111,242
Other		44,946		(35,544	)		9,402

Total	$	1,414,980	$	(1,209,818	)	$	205,162

Amortization Expense on Definite-Lived Intangible Assets

The estimated future amortization expense of def

nite-lived purchased intangible assets as of September 30, 2020 is as follows:


	Amount
Fiscal year:
2021	$	78,345
2022		63,819
2023		46,672
2024		38,954
2025		34,534
Thereafter		34,010

Total	$	296,334

Income Taxes (Tables)

12 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Provision (benefit) for Income Taxes

The provision (benefit) for income taxes consists of the following:


	Year Ended September 30,
	2020		2019			2018
Current	$	55,243	$	102,391		$	42,047
Deferred		30,239		(13,950	)		25,098

Income taxes	$	85,482	$	88,441		$	67,145

Components of Deferred Tax Assets and Liabilities

Deferred income taxes are comprised of the following components:


	As of September 30,
	2020			2019
Deferred tax assets:
Deferred revenue	$	25,252		$	30,659
Employee compensation and benefits		75,689			76,327
Intangible assets, computer software and intellectual property		18,705			11,805
Tax credits, net capital and operating loss carryforwards		142,718			153,062
Lease liabilities		71,204			—
Other		52,611			73,249

Total deferred tax assets		386,179			345,102
Valuation allowances		(69,455	)		(85,533	)

Total deferred tax assets, net		316,724			259,569

Deferred tax liabilities:
Anticipated withholdings on subsidiaries’ earnings		(81,489	)		(70,961	)
Intangible assets, computer software and intellectual property		(114,772	)		(104,926	)
Lease assets		(69,215	)		—
Other		(90,825	)		(81,736	)

Total deferred tax liabilities		(356,301	)		(257,623	)

Net deferred tax (liabilities) assets	$	(39,577	)	$	1,946

Effective Income Tax Rate Varied from Statutory Guernsey Tax Rate

The effective income tax rate varied from the statutory Guernsey tax rate as follows:


	Year Ended September 30,
	2020			2019			2018
Statutory Guernsey tax rate		0	%		0	%		0	%
Foreign taxes(1)		14.7			15.6			15.9

Effective income tax rate		14.7	%		15.6	%		15.9	%

income

(1)	Foreign taxes for the year ended Sep 30, 2020:

In fiscal year 2020, foreign taxes

included a total amount of releases of gross

unrecognized

tax benefits of $

47,582

14,971

was included within income tax expense for fiscal year 2020.

Foreign taxes in fiscal year 2020 also included a b

nefit of $15,438 resulting from the release of valuation allowances on deferred tax assets at certain of the Company’s subsidiaries, which will, more likely than not,

be realized due to the Company’s projections of future taxable income.

On March 27, 2020, the U.S. government enacted the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) to provide certain relief as a result of the

COVID-19

outbreak. Some of the key income

tax-related

provisions of the CARES Act include modification in the usage of net operating losses, interest deductions and payroll benefits. Furthermore,

ther governments have offered and may continue to offer support to companies who operate in those countries.

Foreign taxes in fiscal year 2020 also included a tax benefit of $4,964 resulting from tax enactments

related to the

COVID-19

in certain jurisdictions.

(1)	Foreign taxes for the year ended Sep 30, 2019:

(1)	Foreign taxes for the year ended Sep 30, 2018:

Aggregate Changes in Balance of Company's Gross Unrecognized Tax Benefits

The aggregate changes in the balance of the Company’s gross unrecognized tax benefits were as

follows


	Year Ended September 30,
	2020			2019			2018
Balance at beginning of fiscal year	$	169,322		$	187,646		$	193,024
Additions based on tax positions related to the current year		23,154			19,530			20,329
Additions for tax positions of prior years		23,292			27,558			6,743
Reductions for tax positions of prior years		(15,214	)		(2,578	)		(10,548	)
Settlements with tax authorities(1)		(29,400	)		(37,672	)		(3,880	)
Lapse of statute of limitations		(2,968	)		(25,162	)		(18,022	)

Balance at end of fiscal year	$	168,186		$	169,322		$	187,646

Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Sep. 30, 2020

Accrued expenses and Other Current Liabilities [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities

Accrued expenses and other

urrent liabilities consist of the following:


	As of September 30,
	2020		2019
Ongoing accrued expenses	$	217,133	$	259,661
Project-related provisions		121,658		140,701
Taxes payable		25,739		28,335
Dividends payable(1)		43,084		38,413
Derivative instruments(2)		4,902		5,053
Other		181,092		175,494

	$	593,608	$	647,657

(1)	The amounts payable as a result of the August 5, 2020 and the August 7, 2019 dividend declarations. See Note 20 to the consolidated financial statements.

(2)	Includes derivatives that are designated as hedging instruments and derivatives that are not designated as hedging instruments. See Note 7 to the consolidated financial statements.

Interest and other expense, net (Tables)

12 Months Ended

Sep. 30, 2020

Other Income and Expenses [Abstract]

Interest and Other Expense, Net

Interest and other expen

e, net, consists of the following:


	Year Ended September 30,
	2020			2019			2018
Interest income	$	(4,233	)	$	(6,225	)	$	(6,602	)
Interest expense(1)		10,427			3,911			2,764
Foreign exchange loss		3,382			7,860			6,173
Other, net		1,860			(3,687	)		4,431

	$	11,436		$	1,859		$	6,766

(1)	For further details, see Note 13 to the consolidated financial statements.

Leases (Tables)

12 Months Ended

Sep. 30, 2020

Leases [Abstract]

Disclosure of Lease Cost

Lease costs were as follows


	Year ended September 30, 2020
Total net lease cost(*)	$	91,025

(*)	Variable lease cost is immaterial

Summary of Supplemental Information Related to Operating Lease

Supplemental information related to operating lease transactions was as follows:


	Year ended September 30, 2020
Lease liability payments	$	88,272
Lease assets obtained in exchange for liabilities	$	87,820


	As of September 30, 2020
Weighted average remaining lease term — Operating leases		6.8 Years
Weighted average discount rate — Operating leases		3.5	%

Future Undiscounted Cash Outflows for Operating Leases Maturity

The following maturity analysis presents future undiscounted cash outflows for operating leases as of September 30, 2020


For the year ended September 30,
2021	$	70,485
2022		63,315
2023		41,799
2024		33,343
2025		28,088
Thereafter		107,216
Total lease payments	$	344,246
Less: imputed interest		(55,070	)

Present value of lease liabilities	$	289,176

Minimum Rental Commitments under Non-Cancelable Operating Leases Accounted for ASC 840

Future minimum rental commitments under

non-cancelable

operating leases as of September 30, 2019, which were accounted for per prior lease accounting (ASC 840), were as follows:


For the year ended September 30,
2020	$	69,043
2021		60,544
2022		51,863
2023		31,951
2024		24,350
Thereafter		93,845

	$	331,596

Stock Option and Incentive Plan (Tables)

12 Months Ended

Sep. 30, 2020

Disclosure of Stock Option and Incentive Plan [Abstract]

Summary of Option Activity

The following table summarizes information about options to purchase the Company

’

s ordinary shares, as well as changes during the fiscal year ended September 30, 2020:


	Number of Share Options			Weighted Average Exercise Price
Outstanding as of October 1, 2019		6,837		$	56.65
Granted		1,133			69.53
Exercised		(1,871	)		52.28
Forfeited		(383	)		62.33

Outstanding as of September 30, 2020(1)		5,716		$	60.26

Exercisable as of September 30, 2020(1)		2,401		$	54.72

(1)	As of September 30, 2020, the weighted average remaining contractual life of outstanding and exercisable options was 7.16 and 5.68 years, respectively.

Summary of Restricted Shares Activity

The following table summarizes information relating to awards of restricted shares, as well as changes during the fiscal year ended September 30, 2020:


	Number of Shares			Weighted Average Grant Date Fair Value
Outstanding as of October 1, 2019		937		$	61.70
Granted		659			70.03
Vested		(425	)		61.72
Forfeited		(74	)		63.61

Outstanding as of September 30, 2020		1,097		$	66.57

Employee Equity-Based Compensation Pre-Tax Expense

Employee equity-based compensation

pre-tax

expense for the years ended September 30, 2020, 2019 and 2018 was as follows:


	Year Ended September 30,
	2020		2019		2018
Cost of revenue	$	20,005	$	19,879	$	18,253
Research and development		3,058		2,714		3,476
Selling, general and administrative		19,371		15,957		25,747

Total	$	42,434	$	38,550	$	47,476

Assumptions Used in Calculating Fair Value of Options

The fair value of options granted was estimated on the

ate of grant using the Black-Scholes pricing model with the assumptions noted in the following table (all in weighted averages for options granted during the year):


	Year Ended September 30,
	2020			2019			2018
Risk-free interest rate(1)		1.41	%		2.64	%		2.30	%
Expected life of stock options(2)		4.50			4.50			4.50
Expected volatility(3)		17.3	%		17.8	%		15.0	%
Expected dividend yield(4)		1.75	%		1.82	%		1.51	%
Fair value per option	$	8.85		$	9.13		$	8.70

(1)	Risk-free interest rate is based upon U.S. Treasury yield curve appropriate for the term of the Company’s employee stock options.

(2)	Expected life of stock options is based upon historical experience.

(3)	Expected volatility is based on blended volatility.

(4)	Expected dividend yield is based on the Company’s history and future expectation of dividend payouts.

Dividends (Tables)

12 Months Ended

Sep. 30, 2020

Other Liabilities Disclosure [Abstract]

Summary of Dividends Declared by Board of directors

The Company’s Board of Directors declared the following dividends during the fiscal years ended September 30, 2020, 2019 and 2018:


Declaration Date	Dividends Per Ordinary Share		Record Date		Total Amount		Payment Date

August 5, 2020	$	0.3275		September 30, 2020	$	43,084		October 23, 2020
May 7, 2020	$	0.3275		June 30, 2020	$	43,568		July 24, 2020
February 4, 2020	$	0.3275		March 31, 2020	$	43,723		April 24, 2020
November 12, 2019	$	0.285		December 31, 2019	$	38,357		January 24, 2020


August 7, 2019	$	0.285		September 30, 2019	$	38,413		October 25, 2019
May 14, 2019	$	0.285		June 28, 2019	$	38,730		July 19, 2019
February 5, 2019	$	0.285		March 29, 2019	$	39,084		April 19, 2019
November 8, 2018	$	0.250		December 31, 2018	$	34,755		January 18, 2019


July 31, 2018	$	0.250		September 28, 2018	$	35,046		October 19, 2018
May 10, 2018	$	0.250		June 29, 2018	$	35,363		July 20, 2018
January 30, 2018	$	0.250		March 30, 2018	$	35,637		April 20, 2018
November 8, 2017	$	0.220		December 29, 2017	$	31,556		January 19, 2018

Earnings Per Share (Tables)

12 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share:


	Year Ended September 30,
	2020			2019			2018
Numerator:
Net income	$	497,840		$	479,446		$	354,396
Net income and dividends attributable to participating restricted shares		(3,663	)		(3,295	)		(2,650	)

Numerator for basic earnings per common share	$	494,177		$	476,151		$	351,746

Undistributed income allocated to participating restricted shares		2,417			2,252			1,617
Undistributed income reallocated to participating restricted shares		(2,406	)		(2,240	)		(1,603	)

Numerator for diluted earnings per common share	$	494,188		$	476,163		$	351,760

Denominator:
Weighted average number of shares outstanding — basic		133,590			137,418			142,422
Weighted average number of participating restricted shares		(983	)		(944	)		(1,065	)

Weighted average number of common shares — basic		132,607			136,474			141,357

Effect of dilutive stock options granted		642			691			1,282
Weighted average number of common shares — diluted		133,249			137,165			142,639

Basic earnings per common share	$	3.73		$	3.49		$	2.49

Diluted earnings per common share	$	3.71		$	3.47		$	2.47

Segment Information and Sales to Significant Customers (Tables)

12 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Summary of Revenue by Geographic Area


	Year Ended September 30,
	2020		2019		2018
Revenue
North America (mainly United States)	$	2,720,911	$	2,582,719	$	2,550,234
Europe		613,751		598,731		572,196
Rest of the world		834,377		905,219		852,407

Total	$	4,169,039	$	4,086,669	$	3,974,837

Summary of Long-Lived Assets by Geographic Area


	As of September 30,
	2020		2019
Long-lived Assets(1)
Europe	$	211,292	$	206,086
North America		104,918		95,876
Rest of the world:
Israel ( 2)		237,561		168,493
India		38,706		36,546
Others		15,474		18,313

Total	$	607,951	$	525,314

(1)	Property and equipment, net.

(2)	For more details, see also note 2.

Revenue by Nature of Activities

Revenue by nature of activities


	Year Ended September 30,
	2020		2019		2018
Managed services arrangements	$	2,398,691	$	2,246,279	$	2,051,589
Others		1,770,348		1,840,390		1,923,248

Total	$	4,169,039	$	4,086,669	$	3,974,837

Summary Sales to Significant Customers

The following table summarizes the percentage of sales to significant customer groups which accounted for at least ten percent of its total revenue in each of fiscal years 2020, 2019 and 2018.


	Year Ended September 30,
	2020			2019			2018
Revenue
Customer 1		25.8	%		23.4	%		27.3	%

Customer 2		12.1	%		*			*

*	Represents an amount of less than 10%.

Selected Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Sep. 30, 2020

Quarterly Financial Information Disclosure [Abstract]

Quarterly Results of Operations

The following are details of the unaudited quarterly results of operations for the three months ended:


	September 30,		June 30,		March 31,		December 31,
2020
Revenue	$	1,052,948	$	1,026,201	$	1,047,933	$	1,041,957
Operating income		146,938		147,531		156,712		143,577
Net income		134,463		120,407		127,038		115,932
Basic earnings per share		1.02		0.90		0.95		0.86
Diluted earnings per share		1.01		0.90		0.94		0.85
2019
Revenue	$	1,030,253	$	1,024,704	$	1,019,657	$	1,012,055
Operating income		144,154		142,320		150,175		133,097
Net income		122,027		131,448		124,279		101,692
Basic earnings per share		0.90		0.96		0.90		0.73
Diluted earnings per share		0.90		0.96		0.90		0.72

Nature of Entity - Additional Information (Detail)	12 Months Ended
Nature of Entity - Additional Information (Detail)	Sep. 30, 2020 Segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segment	1

Summary of Significant Accounting Policies - Consolidation and Property and Equipment - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2020
Property and Equipment, Net [Line Items]
Property and equipment, Depreciation methods	straight-line method
Minimum [Member]
Property and Equipment, Net [Line Items]
Estimated useful life of assets	3 years
Maximum [Member]
Property and Equipment, Net [Line Items]
Estimated useful life of assets	10 years

Summary of Significant Accounting Policies - Revenue Recognition and Concentrations of Credit Risk - Additional Information (Detail) $ in Thousands	12 Months Ended
	Sep. 30, 2020 USD ($) Customer	Sep. 30, 2019 USD ($) Customer
Concentration Risk [Line Items]
Number of customers with an account receivable balance of more than 10% of total accounts receivable \| Customer	1	1
Allowance for doubtful accounts \| $	$ 23,419	$ 36,121
Accounts Receivable [Member] \| Customer [Member]
Concentration Risk [Line Items]
Aggregate account receivable of more than 10% of total accounts receivable	22.00%	16.00%

Summary of Significant Accounting Policies - Summary of Impact of Adoption of ASC 842 on Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Oct. 01, 2019	Sep. 30, 2019
Prepaid expenses and other current assets	$ 229,604		$ 216,084
Lease assets	295,494
Other noncurrent assets	488,620		423,941
Accrued expenses and other current liabilities	(593,608)		(647,657)
Lease liabilities (current)	(59,100)
Lease liabilities (non-current)	(230,076)
Other noncurrent liabilities	$ (327,680)		(334,922)
Accounting Standards Update 2016-02 [Member]
Prepaid expenses and other current assets		$ 209,387
Lease assets		281,785
Other noncurrent assets		421,186
Accrued expenses and other current liabilities		(644,104)
Lease liabilities (current)		(63,351)
Lease liabilities (non-current)		(221,050)
Other noncurrent liabilities		$ (326,407)
Accounting Standards Update 2016-02 [Member] \| Adjustments due to ASC 842 [Member]
Prepaid expenses and other current assets			(6,697)
Lease assets			281,785
Other noncurrent assets			(2,755)
Accrued expenses and other current liabilities			3,553
Lease liabilities (current)			(63,351)
Lease liabilities (non-current)			(221,050)
Other noncurrent liabilities			$ 8,515

Acquisitions - Additional Information (Detail) $ in Thousands	12 Months Ended
	Sep. 30, 2020 USD ($) Business	Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Business acquisition	$ 291,459
Number of businesses acquired \| Business	3
TTS Wireless [Member]
Business Acquisition [Line Items]
Business acquisition		$ 64,963

Revenue - Summary of Accounts Receivable Billed and Unbilled and Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable—billed (net of allowances for doubtful accounts of $23,419 and $36,121 as of September 30, 2020 and 2019, respectively)	$ 685,485	$ 760,797
Accounts receivable—unbilled (current)	175,548	227,061
Accounts receivable—unbilled (non-current)	42,089	16,987
Total Accounts receivable—unbilled	217,637	244,048
Deferred revenue (current)	(126,841)	(118,182)
Deferred revenue (non-current)	(16,529)	(23,785)
Total Deferred revenue	$ (143,370)	$ (141,967)

Revenue - Summary of Accounts Receivable Billed and Unbilled and Deferred Revenue (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Allowance for doubtful accounts	$ 23,419	$ 36,121

Revenue - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Deferred revenue recognized	$ 104,648	$ 93,508
Unsatisfied remaining performance obligations	$ 5,100,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01
Remaining performance obligation, expected timing of recognized	3 years

Fair Value Measurements - Fair Value Measurement on Company's Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	$ 559,385	$ 69,370
Money Market Funds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	558,633	69,370
Corporate Bonds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	752
Recurring [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	559,385	69,370
Equity Investments	24,211	18,008
Derivative financial instruments, net	20,636	7,890
Other liabilities	(19,641)	(29,805)
Total	584,591	65,463
Recurring [Member] \| Money Market Funds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	558,633	69,370
Recurring [Member] \| Corporate Bonds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	752
Level 1 [Member] \| Recurring [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	558,633	69,370
Total	558,633	69,370
Level 1 [Member] \| Recurring [Member] \| Money Market Funds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	558,633	69,370
Level 2 [Member] \| Recurring [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	752
Derivative financial instruments, net	20,636	7,890
Total	21,388	7,890
Level 2 [Member] \| Recurring [Member] \| Corporate Bonds [Member]
Available-for-sale securities:
Fair value, Measured on recurring basis, Investments	752
Level 3 [Member] \| Recurring [Member]
Available-for-sale securities:
Equity Investments	24,211	18,008
Other liabilities	(19,641)	(29,805)
Total	$ 4,570	$ (11,797)

Available-for-Sale Securities - Additional Information (Detail) $ in Thousands	12 Months Ended
	Sep. 30, 2019 USD ($)
Investments, Debt and Equity Securities [Abstract]
Total amount of Available-for-sale securities sold	$ 101,287

Available-for-Sale Securities - Interest-bearing Investments in Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 559,387	$ 69,370
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2	0
Fair Value	559,385	69,370
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	754
Gross Unrealized Gains	0
Gross Unrealized Losses	2
Fair Value	752
Money Market Funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	558,633	69,370
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	$ 558,633	$ 69,370

Available-for-Sale Securities - Interest-bearing Investments in Available-for-Sale Securities (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities	$ 559,385	$ 69,370
Short Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturity period of Available-for-sale securities	longer than 90 days	longer than 90 days
Available-for-sale securities	$ 752
Cash and Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Maturity period of Available-for-sale securities	90 days or less	90 days or less
Available-for-sale securities	$ 558,633

Available-for-Sale Securities - Available-for-Sale Securities Debt Maturities Market Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year	$ 558,633
1 to 2 years	0
2 to 3 years	752
3 to 4 years	0
Thereafter	0
Total	$ 559,385	$ 69,370

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Item]
Maximum amount of loss due to credit risk	$ 20,636
Maximum length of time hedged in cash flow hedges	3 years
Maturity period of significant portion of forward and option contracts outstanding	12 months
Net unrealized gain (loss) from cash flow hedges recognized in other comprehensive income (loss) , net of taxes	$ 21,903	$ 19,228	$ (31,908)
Typical maturity period of other risk management derivatives	less than 12 months
Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Item]
Net unrealized gain (loss) from cash flow hedges recognized in other comprehensive income (loss)	$ 26,408	20,035	(34,260)
Net unrealized gain (loss) from cash flow hedges recognized in other comprehensive income (loss) , net of taxes	21,903	$ 19,228	$ (31,908)
Foreign currency cash flow hedge, reclassified into earnings during fiscal year 2021	$ 15,721

Derivative Financial Instruments - Notional Amounts of Derivative Instruments (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Foreign exchange contracts	$ 1,220,000

Derivative Financial Instruments - Fair Value of Open Foreign Currency Exchange Contracts (Detail) - Foreign Exchange Contracts [Member] - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Derivatives, Fair Value [Line Items]
Net fair value	$ 20,636	$ 7,890
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Net fair value	20,381	4,880
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Net fair value	255	3,010
Prepaid Expenses and Other Current Assets [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	21,153	9,344
Prepaid Expenses and Other Current Assets [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	3,068	5,086
Other Noncurrent Assets [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset	1,317	585
Accrued Expenses and Other Current Liabilities [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	(2,089)	(2,977)
Accrued Expenses and Other Current Liabilities [Member] \| Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	(2,813)	(2,076)
Other Noncurrent Liabilities [Member] \| Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 0	$ (2,072)

Derivative Financial Instruments - Effect of Cash Flow Hedging Instruments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Item]
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion)	$ 9,146	$ (12,976)	$ 21,337
Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Item]
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion)	834	19	(1,129)
Cost of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Item]
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion)	4,166	(8,627)	15,877
Research and Development [Member]
Derivative Instruments, Gain (Loss) [Line Item]
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion)	1,646	(2,059)	3,127
Selling, General and Administrative [Member]
Derivative Instruments, Gain (Loss) [Line Item]
Gains (Losses) Reclassified from Other Comprehensive Income (Loss) (Effective Portion)	$ 2,500	$ (2,309)	$ 3,462

Derivative Financial Instruments - Changes in Net Unrealized Gains (Losses) on Cash Flow Hedges (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net unrealized gain (loss) on cash flow hedges, net of tax, beginning of period	$ 3,945	$ (26,608)	$ 24,508
Changes in fair value of cash flow hedges, net of tax	21,903	19,228	(31,908)
Reclassification of (gain) loss into earnings, net of tax	(7,012)	11,325	(19,208)
Net unrealized gain (loss) on cash flow hedges, net of tax, end of period	$ 18,836	$ 3,945	$ (26,608)

Derivative Financial Instruments - Effect of Non-Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	$ (2,042)	$ 6,026	$ 2,356
Cost of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	(718)	401	(4,577)
Research and Development [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	(341)	14	(736)
Selling, General and Administrative [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	(559)	294	(950)
Interest and Other Expense, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	255	5,845	7,038
Income Taxes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses) Gains Recognized in Income	$ (679)	$ (528)	$ 1,581

Property and Equipment, Net - Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 1,627,670	$ 1,497,541
Less accumulated depreciation	(1,019,719)	(972,227)
Property and equipment, net	607,951	525,314
Computers, Related Equipment and Software [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	1,163,807	1,109,465
Building and Land [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	177,255	109,446
Leasehold Improvements [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	234,777	230,817
Furniture, Fixtures and Other [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 51,831	$ 47,813

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Property and Equipment [Abstract]
Depreciation expense	$ 117,632	$ 111,387	$ 105,439
Software assets developed for internal use costs, net of accumulated depreciation	$ 179,837	$ 171,331

Goodwill and Intangible Assets, Net - Details of Total Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Beginning Balance	$ 2,462,835	$ 2,444,895
Goodwill resulting from acquisitions	118,628	17,484
Other	(2,818)	456
Goodwill, Ending Balance	$ 2,578,645	$ 2,462,835

Goodwill and Intangible Assets, Net - Details of Total Goodwill (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Line Items]
Goodwill resulting from acquisitions	$ 118,628	$ 17,484
Value of intangible asset	296,334	205,162
Core Technology [Member]
Goodwill [Line Items]
Value of intangible asset	161,280	84,518
Customer Relationships [Member]
Goodwill [Line Items]
Value of intangible asset	124,905	111,242
TTS Wireless [Member]
Goodwill [Line Items]
Goodwill resulting from acquisitions		8,218
TTS Wireless [Member] \| Trademarks [Member]
Goodwill [Line Items]
Value of intangible asset		$ 1,300
Useful life of intangible assets		4 years
TTS Wireless [Member] \| Core Technology [Member]
Goodwill [Line Items]
Value of intangible asset		$ 2,100
Useful life of intangible assets		6 years
TTS Wireless [Member] \| Customer Relationships [Member]
Goodwill [Line Items]
Value of intangible asset		$ 29,500
Useful life of intangible assets		6 years
Openet [Member]
Goodwill [Line Items]
Goodwill resulting from acquisitions	102,898
Openet [Member] \| Trademarks [Member]
Goodwill [Line Items]
Value of intangible asset	$ 2,594
Useful life of intangible assets	2 years
Openet [Member] \| Core Technology [Member]
Goodwill [Line Items]
Value of intangible asset	$ 53,614
Useful life of intangible assets	5 years
Openet [Member] \| Customer Relationships [Member]
Goodwill [Line Items]
Value of intangible asset	$ 40,409
Useful life of intangible assets	8 years

Goodwill and Intangible Assets, Net - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2020 USD ($) Segment	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment of goodwill	$ 0	$ 0	$ 0
Number of operating segment \| Segment	1
Amortization of definite-lived purchased intangible assets	$ 80,777,000	$ 94,385,000	$ 105,785,000

Goodwill and Intangible Assets, Net - Details Regarding Total Definite-Lived Purchased Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Definite-Lived Intangible Assets [Line Items]
Gross	$ 1,586,929	$ 1,414,980
Accumulated Amortization	(1,290,595)	(1,209,818)
Total	296,334	205,162
Core Technology [Member]
Definite-Lived Intangible Assets [Line Items]
Gross	896,814	775,479
Accumulated Amortization	(735,534)	(690,961)
Total	161,280	84,518
Customer Relationships [Member]
Definite-Lived Intangible Assets [Line Items]
Gross	642,575	594,555
Accumulated Amortization	(517,670)	(483,313)
Total	124,905	111,242
Other [Member]
Definite-Lived Intangible Assets [Line Items]
Gross	47,540	44,946
Accumulated Amortization	(37,391)	(35,544)
Total	$ 10,149	$ 9,402

Goodwill and Intangible Assets, Net - Estimated Future Amortization Expense (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
2021	$ 78,345
2022	63,819
2023	46,672
2024	38,954
2025	34,534
Thereafter	34,010
Total	$ 296,334	$ 205,162

Non-recurring charges - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Employee Severance [Member]
Schedule of Non-recurring Charges [Line Items]
Restructuring charge		$ 30,057
Long Running Legal Dispute [Member]
Schedule of Non-recurring Charges [Line Items]
Non-recurring charges		$ 55,000
Settlement payments	$ 50,000
Legal fees and other associated costs	$ 5,000

Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Current	$ 55,243	$ 102,391	$ 42,047
Deferred	30,239	(13,950)	25,098
Income taxes	$ 85,482	$ 88,441	$ 67,145

Disclosure of Stock Option and Incentive Plan [Abstract]

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Line Items]
Net decrease in valuation allowances	$ 16,078	$ 27,194
Tax credits, net capital and operating loss carryforwards	829,260	797,091
Tax credits, net capital and operating loss carryforwards having expiration date	$ 245,843	$ 244,711
Tax credits, net capital and operating loss carryforwards expiration date	Through 2040 for $245,843 in net operating losses	Through 2039 for $244,711 in net operating losses
Gross unrecognized tax benefits	$ 168,186	$ 169,322	$ 187,646	$ 193,024
Accrued income taxes payable for interest and penalties relating to unrecognized tax benefits	15,812	31,108
Interest and penalty releases net recognized in the income statement	15,396
Tax benefit recognized in the statements of income, net of interest and penalty reversals		4,679
Foreign tax benefit resulting from tax enactments related to COVID-19	4,964
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	29,400	37,672	3,880
Release of gross unrecognized tax benefits offset by a net benefit included within income tax expense	14,971
Tax benefit related to the release of withholding and income tax reserves for unremitting earnings	28,795	$ 28,795	$ 28,795
Maximum [Member]
Income Taxes [Line Items]
Expected decrease in unrecognized tax benefits within next 12 months	$ 15,446
GUERNSEY
Income Taxes [Line Items]
Statutory Guernsey tax rate	0.00%	0.00%	0.00%
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 47,582
Prepaid Expenses and Other Current Assets [Member]
Income Taxes [Line Items]
Tax receivable balance	$ 58,336	$ 53,143

Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Deferred tax assets:
Deferred revenue	$ 25,252	$ 30,659
Employee compensation and benefits	75,689	76,327
Intangible assets, computer software and intellectual property	18,705	11,805
Tax credits, net capital and operating loss carryforwards	142,718	153,062
Lease liabilities	71,204
Other	52,611	73,249
Total deferred tax assets	386,179	345,102
Valuation allowances	(69,455)	(85,533)
Total deferred tax assets, net	316,724	259,569
Deferred tax liabilities:
Anticipated withholdings on subsidiaries' earnings	(81,489)	(70,961)
Intangible assets, computer software and intellectual property	(114,772)	(104,926)
Lease assets	(69,215)
Other	(90,825)	(81,736)
Total deferred tax liabilities	(356,301)	(257,623)
Net deferred tax (liabilities) assets	$ (39,577)	$ 1,946

Income Taxes - Effective Income Tax Rate Varied from Statutory Guernsey Tax Rate (Detail)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Foreign taxes (percentage)	14.70%	15.60%	15.90%
Effective income tax rate	14.70%	15.60%	15.90%
GUERNSEY
Schedule of Effective Income Tax Rate Reconciliation [Line Items]
Statutory Guernsey tax rate	0.00%	0.00%	0.00%

Income Taxes - Effective Income Tax Rate Varied from Statutory Guernsey Tax Rate (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Tax benefit primarily attributable to expiration of periods set forth in statutes of limitations and conclusions of tax audits related to unrecognized tax benefits		$ 26,529	$ 9,564
Tax benefit resulting from the release of valuation allowances on deferred tax assets	$ 15,438	12,650	12,032
Lapse of statute of limitations	2,968	25,162	18,022
Provisional expense due to US tax law change			2,321
Provisional tax liability related to tax implications of retaining earnings			4,059
Tax benefit related to the release of withholding and income tax reserves for unremitting earnings	$ 28,795	$ 28,795	$ 28,795

Income Taxes - Aggregate Changes in Balance of Company's Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, Beginning balance	$ 169,322	$ 187,646	$ 193,024
Additions based on tax positions related to the current year	23,154	19,530	20,329
Additions for tax positions of prior years	23,292	27,558	6,743
Reduction for tax positions of prior years	(15,214)	(2,578)	(10,548)
Settlements with tax authorities	(29,400)	(37,672)	(3,880)
Lapse of statute of limitations	(2,968)	(25,162)	(18,022)
Unrecognized tax benefits, Ending balance	$ 168,186	$ 169,322	$ 187,646

Income Taxes - Aggregate Changes in Balance of Company's Gross Unrecognized Tax Benefits (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Settlements with tax authorities	$ 29,400	$ 37,672	$ 3,880

Repurchase of Shares - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
	Sep. 30, 2020	Nov. 12, 2019	Nov. 08, 2017
Equity, Class of Treasury Stock [Line Items]
Repurchase of shares, Shares	5,668
Average price at which ordinary shares are repurchased	$ 63.66
Share Repurchase Program 2017 Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, Authorized amount			$ 800,000,000
Share Repurchase Program 2019 Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, Authorized amount		$ 800,000,000
Remaining authority to repurchase outstanding ordinary shares	$ 678,344,000

Financing Arrangements - Additional Information (Detail) - USD ($)	1 Months Ended			12 Months Ended
	Jun. 30, 2020	Dec. 31, 2017	Dec. 31, 2014	Sep. 30, 2020	May 31, 2020	Mar. 31, 2020	Dec. 31, 2011
Line of Credit Facility [Line Items]
Outstanding letters of credit and bank guarantees				$ 93,554,000
Short-term loan outstanding				100,000,000
Senior Notes [Member]
Line of Credit Facility [Line Items]
Short-term loan	$ 650,000,000
Debt Interest rate	2.538%
Debt issue cost	$ 6,121,000
Interest Expense Debt				4,562,000
Long Term Debt Fair Value				674,512,000
Senior Notes [Member] \| Accrued Liabilities [Member]
Line of Credit Facility [Line Items]
Accrued Interest Current				4,418,000
Senior Notes [Member] \| Long-term Debt [Member]
Line of Credit Facility [Line Items]
Noncurrent outstanding principal portion				$ 650,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Five-year revolving credit facility							$ 500,000,000
Revolving credit facility, maturity term				5 years
Revolving credit facility, maturity period		2022-12	2019-12
Borrowings under the revolving credit facility						$ 300,000,000
Repayments of revolving credit facility	300,000,000
Repayments of short term loans	$ 50,000,000
Outstanding borrowings				$ 0
Short-term loan outstanding					$ 100,000,000

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Accrued expenses and Other Current Liabilities [Abstract]
Ongoing accrued expenses	$ 217,133	$ 259,661
Project-related provisions	121,658	140,701
Taxes payable	25,739	28,335
Dividends payable	43,084	38,413
Derivative instruments	4,902	5,053
Other	181,092	175,494
Total accrued expenses and other current liabilities	$ 593,608	$ 647,657

Interest and Other Expense, Net - Interest and Other Expense, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Interest income	$ (4,233)	$ (6,225)	$ (6,602)
Interest expense	10,427	3,911	2,764
Foreign exchange loss	3,382	7,860	6,173
Other, net	1,860	(3,687)	4,431
Total	$ 11,436	$ 1,859	$ 6,766

Leases - Disclosure of Lease Cost (Detail) $ in Thousands	12 Months Ended
Leases - Disclosure of Lease Cost (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Lease, Cost [Abstract]
Total net lease cost	$ 91,025

Leases - Summary of Supplemental Information Related to Operating Lease (Detail) $ in Thousands	12 Months Ended
	Sep. 30, 2020 USD ($)
Disclosure of Supplemental Cash Flow Information Related to Operating Lease [Line Items]
Lease liability payments	$ 88,272
Lease assets obtained in exchange for liabilities	$ 87,820
Weighted average remaining lease term—Operating leases	6 years 9 months 18 days
Weighted average discount rate—Operating leases	3.50%

Leases - Future Undiscounted Cash Outflows for Operating Leases Maturity (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Future undiscounted cash outflows for operating leases [Line Items]
2021	$ 70,485
2022	63,315
2023	41,799
2024	33,343
2025	28,088
Thereafter	107,216
Total lease payments	344,246
Less: imputed interest	(55,070)
Present value of lease liabilities	$ 289,176

Leases - Minimum Rental Commitments under Non-Cancelable Operating Leases Accounted for ASC 840 (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Schedule of Future Minimum Rental Payments for Operating Leases as accounted for per ASC 840 [Line Items]
2020	$ 69,043
2021	60,544
2022	51,863
2023	31,951
2024	24,350
Thereafter	93,845
Total	$ 331,596

Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating Leases, Rent Expense, Net	$ 65,692	$ 63,603

Contingencies and Commitments - Additional Information (Detail) - Long Running Legal Dispute [Member] $ in Thousands	12 Months Ended
	Sep. 30, 2019 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Settlement payments	$ 50,000
Legal fees and other costs	$ 5,000

Employee Benefits - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Retirement Benefits [Abstract]
Severance pay liability	$ 270,985	$ 266,209
Deposit with insurance companies	211,566	206,752
Severance expenses	$ 33,354	$ 33,355	$ 28,472

Stock Option and Incentive Plan - Additional Information (Detail) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares authorized to be granted	70,550	67,550	67,550	67,550	62,300
Stock option awards, term	10 years
Total intrinsic value of options exercised	$ 31,220	$ 13,081	$ 38,025
Value of restricted shares vested	28,727	$ 28,430	$ 35,801
Aggregate intrinsic value of stock options outstanding	14,064
Aggregate intrinsic value of stock options exercisable	$ 12,938
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards, vesting period	3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option awards, vesting period	4 years

Stock Option and Incentive Plan - Summary of Option Activity (Detail) shares in Thousands	12 Months Ended
	Sep. 30, 2020 $ / shares shares
Disclosure of Stock Option and Incentive Plan [Abstract]
Number of Share Options, Outstanding, Beginning Balance \| shares	6,837
Number of Share Options, Granted \| shares	1,133
Number of Share Options, Exercised \| shares	(1,871)
Number of Share Options, Forfeited \| shares	(383)
Number of Share Options, Outstanding, Ending Balance \| shares	5,716
Number of Share Options, Exercisable \| shares	2,401
Weighted Average Exercise Price, Outstanding, Beginning Balance \| $ / shares	$ 56.65
Weighted Average Exercise Price, Granted \| $ / shares	69.53
Weighted Average Exercise Price, Exercised \| $ / shares	52.28
Weighted Average Exercise Price, Forfeited \| $ / shares	62.33
Weighted Average Exercise Price, Outstanding, Ending Balance \| $ / shares	60.26
Weighted Average Exercise Price, Exercisable \| $ / shares	$ 54.72

Stock Option and Incentive Plan - Summary of Option Activity (Parenthetical) (Detail)	12 Months Ended
	Sep. 30, 2020
Disclosure of Stock Option and Incentive Plan [Abstract]
Weighted average remaining contractual life of outstanding options	7 years 1 month 28 days
Weighted average remaining contractual life of exercisable options	5 years 8 months 4 days

Stock Option and Incentive Plan - Summary of Restricted Shares Activity (Detail) shares in Thousands	12 Months Ended
	Sep. 30, 2020 $ / shares shares
Disclosure of Stock Option and Incentive Plan [Abstract]
Number of Restricted Shares, Outstanding, Beginning Balance \| shares	937
Number of Restricted Shares, Granted \| shares	659
Number of Restricted Shares, Vested \| shares	(425)
Number of Restricted Shares, Forfeited \| shares	(74)
Number of Restricted Shares, Ending Balance \| shares	1,097
Restricted Shares, Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 61.70
Restricted Shares, Weighted Average Grant Date Fair Value, Granted \| $ / shares	70.03
Restricted Shares, Weighted Average Grant Date Fair Value, Vested \| $ / shares	61.72
Restricted Shares, Weighted Average Grant Date Fair Value, Forfeited \| $ / shares	63.61
Restricted Shares, Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 66.57

Stock Option and Incentive Plan - Employee Equity-Based Compensation Pre-Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation pre-tax expense	$ 42,434	$ 38,550	$ 47,476
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation pre-tax expense	20,005	19,879	18,253
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation pre-tax expense	3,058	2,714	3,476
Selling, General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Equity-based compensation pre-tax expense	$ 19,371	$ 15,957	$ 25,747

Stock Option and Incentive Plan - Assumptions Used in Calculating Fair Value of Options (Detail) - $ / shares

12 Months Ended

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Risk-free interest rate

^[1]

1.41%

2.64%

2.30%

Expected life of stock options

^[2]

4 years 6 months

Expected volatility

^[3]

17.30%

17.80%

15.00%

Expected dividend yield

^[4]

1.75%

1.82%

1.51%

Fair value per option

$ 8.85

$ 9.13

$ 8.70

[1]	Risk-free interest rate is based upon U.S. Treasury yield curve appropriate for the term of the Company’s employee stock options.
[2]	Expected life of stock options is based upon historical experience.
[3]	Expected volatility is based on blended volatility.
[4]	Expected dividend yield is based on the Company’s history and future expectation of dividend payouts.

Dividends - Summary of Dividends Declared by Board of directors (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Dividends Payable [Line Items]
Dividends Per Ordinary Share	$ 1.2675	$ 1.105	$ 0.970
Declaration Date, August 7, 2019 [Member]
Dividends Payable [Line Items]
Declaration Date		Aug. 07, 2019
Record Date		Sep. 30, 2019
Payment Date		Oct. 25, 2019
Dividends Per Ordinary Share		$ 0.285
Total Amount		$ 38,413
Declaration Date, May 14, 2019 [Member]
Dividends Payable [Line Items]
Declaration Date		May 14, 2019
Record Date		Jun. 28, 2019
Payment Date		Jul. 19, 2019
Dividends Per Ordinary Share		$ 0.285
Total Amount		$ 38,730
Declaration Date, February 5, 2019 [Member]
Dividends Payable [Line Items]
Declaration Date		Feb. 05, 2019
Record Date		Mar. 29, 2019
Payment Date		Apr. 19, 2019
Dividends Per Ordinary Share		$ 0.285
Total Amount		$ 39,084
Declaration Date, November 8, 2017 [Member]
Dividends Payable [Line Items]
Declaration Date			Nov. 08, 2017
Record Date			Dec. 29, 2017
Payment Date			Jan. 19, 2018
Dividends Per Ordinary Share			$ 0.220
Total Amount			$ 31,556
Declaration Date, July 31, 2018 [Member]
Dividends Payable [Line Items]
Declaration Date			Jul. 31, 2018
Record Date			Sep. 28, 2018
Payment Date			Oct. 19, 2018
Dividends Per Ordinary Share			$ 0.250
Total Amount			$ 35,046
Declaration Date, May 10, 2018 [Member]
Dividends Payable [Line Items]
Declaration Date			May 10, 2018
Record Date			Jun. 29, 2018
Payment Date			Jul. 20, 2018
Dividends Per Ordinary Share			$ 0.250
Total Amount			$ 35,363
Declaration Date, January 30, 2018 [Member]
Dividends Payable [Line Items]
Declaration Date			Jan. 30, 2018
Record Date			Mar. 30, 2018
Payment Date			Apr. 20, 2018
Dividends Per Ordinary Share			$ 0.250
Total Amount			$ 35,637
Declaration Date, November 8, 2018 [Member]
Dividends Payable [Line Items]
Declaration Date		Nov. 08, 2018
Record Date		Dec. 31, 2018
Payment Date		Jan. 18, 2019
Dividends Per Ordinary Share		$ 0.250
Total Amount		$ 34,755
Declaration Date, August 5, 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Aug. 05, 2020
Record Date	Sep. 30, 2020
Payment Date	Oct. 23, 2020
Dividends Per Ordinary Share	$ 0.3275
Total Amount	$ 43,084
Declaration Date, May 7, 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	May 07, 2020
Record Date	Jun. 30, 2020
Payment Date	Jul. 24, 2020
Dividends Per Ordinary Share	$ 0.3275
Total Amount	$ 43,568
Declaration Date, February 4, 2020 [Member]
Dividends Payable [Line Items]
Declaration Date	Feb. 04, 2020
Record Date	Mar. 31, 2020
Payment Date	Apr. 24, 2020
Dividends Per Ordinary Share	$ 0.3275
Total Amount	$ 43,723
Declaration Date, November 12, 2019 [Member]
Dividends Payable [Line Items]
Declaration Date	Nov. 12, 2019
Record Date	Dec. 31, 2019
Payment Date	Jan. 24, 2020
Dividends Per Ordinary Share	$ 0.285
Total Amount	$ 38,357

Dividends - Additional Information (Detail)	Nov. 10, 2020 $ / shares
Dividends Payable [Line Items]
Quarterly dividend payment per share	$ 0.36
Cash dividend anticipated payable date	2021-04
First Installment [Member]
Dividends Payable [Line Items]
Dividends payable date declared	Nov. 10, 2020
Quarterly dividend payment per share	$ 0.3275
Record Date	Dec. 31, 2020
Cash dividend payable date	Jan. 22, 2021

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

12 Months Ended

Sep. 30, 2020

Jun. 30, 2020

Mar. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Numerator

Net income and dividends attributable to participating restricted shares

$ 134,463

$ 120,407

$ 127,038

$ 115,932

$ 122,027

$ 131,448

$ 124,279

$ 101,692

$ 497,840

^[1]

$ 479,446

^[1]

$ 354,396

^[1]

(3,663)

(3,295)

(2,650)

Numerator for basic earnings per common share

494,177

476,151

351,746

Undistributed income allocated to participating restricted shares

2,417

2,252

1,617

Undistributed income reallocated to participating restricted shares

(2,406)

(2,240)

(1,603)

Numerator for diluted earnings per common share

$ 494,188

$ 476,163

$ 351,760

Denominator

Weighted average number of shares outstanding - basic

133,590

137,418

142,422

Weighted average number of participating restricted shares

(983)

(944)

(1,065)

Weighted average number of common shares - basic

132,607

136,474

141,357

Effect of dilutive stock options granted

642

691

1,282

Weighted average number of common shares - diluted

133,249

137,165

142,639

Basic earnings per common share

$ 1.02

$ 0.90

$ 0.95

$ 0.86

$ 0.90

$ 0.96

$ 0.90

$ 0.73

$ 3.73

$ 3.49

$ 2.49

Diluted earnings per common share

$ 1.01

$ 0.90

$ 0.94

$ 0.85

$ 0.90

$ 0.96

$ 0.90

$ 0.72

$ 3.71

$ 3.47

$ 2.47

[1]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.

Earnings Per Share - Additional Information (Detail) - shares shares in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Weighted average number of shares attributable to antidilutive outstanding stock options not included in the calculation of diluted earnings per share	2,634	3,547	1,357

Segment Information and Sales to Significant Customers - Summary of Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,052,948	$ 1,026,201	$ 1,047,933	$ 1,041,957	$ 1,030,253	$ 1,024,704	$ 1,019,657	$ 1,012,055	$ 4,169,039	$ 4,086,669	$ 3,974,837
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									2,720,911	2,582,719	2,550,234
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									613,751	598,731	572,196
Rest of the World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 834,377	$ 905,219	$ 852,407

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Segment Information and Sales to Significant Customers - Summary of Long-lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 607,951	$ 525,314
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	104,918	95,876
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	211,292	206,086
Israel [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	237,561	168,493
India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	38,706	36,546
Others [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets	$ 15,474	$ 18,313

Segment Information and Sales to Significant Customers - Summary of Revenue by Nature of Activities (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,052,948	$ 1,026,201	$ 1,047,933	$ 1,041,957	$ 1,030,253	$ 1,024,704	$ 1,019,657	$ 1,012,055	$ 4,169,039	$ 4,086,669	$ 3,974,837
Managed services arrangements [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									2,398,691	2,246,279	2,051,589
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 1,770,348	$ 1,840,390	$ 1,923,248

Quarterly Financial Information Disclosure [Abstract]

Segment Information and Sales to Significant Customers - Additional Information (Detail)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Revenue, Major Customer [Line Items]
Minimum percentage of total revenue accounted for one customer	10.00%	10.00%	10.00%

Segment Information and Sales to Significant Customers - Summary Sales to Significant Customers (Detail) - Revenue [Member]	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Percentage of revenue from significant customer	10.00%
Customer 1
Percentage of revenue from significant customer	25.80%	23.40%	27.30%
Customer 2
Percentage of revenue from significant customer	12.10%

Segment Information and Sales to Significant Customers - Summary Sales to Significant Customers (Parenthetical) (Detail)	12 Months Ended
	Sep. 30, 2020
Revenue [Member]
Percentage of revenue from significant customer	10.00%

Selected Quarterly Results of Operations - Quarterly Results of Operations (Detail) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Sep. 30, 2020

Jun. 30, 2020

Mar. 31, 2020

Dec. 31, 2019

Sep. 30, 2019

Jun. 30, 2019

Mar. 31, 2019

Dec. 31, 2018

Sep. 30, 2020

Sep. 30, 2019

Sep. 30, 2018

Revenue

$ 1,052,948

$ 1,026,201

$ 1,047,933

$ 1,041,957

$ 1,030,253

$ 1,024,704

$ 1,019,657

$ 1,012,055

$ 4,169,039

$ 4,086,669

$ 3,974,837

Operating income

146,938

147,531

156,712

143,577

144,154

142,320

150,175

133,097

594,758

569,746

428,307

Diluted earnings per share

$ 134,463

$ 120,407

$ 127,038

$ 115,932

$ 122,027

$ 131,448

$ 124,279

$ 101,692

$ 497,840

^[1]

$ 479,446

^[1]

$ 354,396

^[1]

Basic earnings per share

$ 1.02

$ 0.90

$ 0.95

$ 0.86

$ 0.90

$ 0.96

$ 0.90

$ 0.73

$ 3.73

$ 3.49

$ 2.49

$ 1.01

$ 0.90

$ 0.94

$ 0.85

$ 0.90

$ 0.96

$ 0.90

$ 0.72

$ 3.71

$ 3.47

$ 2.47

[1]	In fiscal years 2020, 2019 and 2018, all of the Company’s net income is attributable to Amdocs Limited as the net income attributable to the Non-controlling interests is negligible.

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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