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Credit Facilities, Short-term Borrowings and Long-term Debt (Short-term Borrowings and Availability Under Various Short-term Credit Facilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Line Of Credit Facility [Line Items] |  |
Total availability | $ 1,027,684 |
Outstanding letters of credit and guarantees | (9,890) |
Outstanding borrowings | (66,800) |
Remaining availability | 950,994 |
Revolving Credit Facility [Member] |  |
Line Of Credit Facility [Line Items] |  |
Total availability | 1,000,000 |
Outstanding letters of credit and guarantees | (9,694) |
Outstanding borrowings | (66,800) | $ 0
Remaining availability | 923,506 |
Foreign Lines of Credit and Overdraft Facilities [Member] |  |
Line Of Credit Facility [Line Items] |  |
Total availability | 27,266 |
Remaining availability | 27,266 |
Foreign Performance Guarantee Facilities [Member] |  |
Line Of Credit Facility [Line Items] |  |
Total availability | 418 |
Outstanding letters of credit and guarantees | (196) |
Remaining availability | $ 222 |

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- Definition Fair value of the amount outstanding under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 + Details
Name: | us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- 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 No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The total amount of the contingent obligation under letters of credit and guarantees outstanding as of the reporting date. + References No definition available. + Details
Name: | wwd_LettersOfCreditAndGuaranteesOutstandingAmount
Namespace Prefix: | wwd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CreditFacilityAxis=wwd_ForeignPerformanceGuaranteeFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |