XML 85 R69.htm IDEA: XBRL DOCUMENT
v3.23.3

Derivative Financial Instruments - Effect of Non-Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | $ (20,585) | $ (12,415) | $ 5,957
Cost of Revenue [Member] |  |  |
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | (2,126) | (8,731) | 4,786
Research and Development [Member] |  |  |
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | (1,078) | (2,195) | 1,187
Selling, General and Administrative [Member] |  |  |
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | (996) | (2,375) | 1,301
Interest and Other Expense, Net [Member] |  |  |
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | (16,312) | (2,132) | 1,808
Income Taxes [Member] |  |  |
Derivative Instruments, (Loss) Gain [Line Items] |  |  |
Gains (Losses) Recognized in Income | $ (73) | $ 3,018 | $ (3,125)

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=dox_InterestExpenseIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=dox_IncomeTaxesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |