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Revenue (Narrative - Performance Obligations) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Remaining performance obligation amount	$ 3,195,156	$ 2,932,793
Material Rights [Member]
Remaining performance obligation amount	$ 513,570

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479806/606-10-50-13

+ Details

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

X

- Details

Name:	srt_ProductOrServiceAxis=wwd_MaterialRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: