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

Fair value of the amount outstanding under the credit facility.

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

- 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

- 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

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=wwd_ForeignLinesOfCreditAndOverdraftFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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