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Revenue (Schedule of Revenue Recognized Related to Noncash Consideration) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Contract With Customer Noncash Consideration [Line Items]
Revenue recognized related to noncash consideration	$ 71,148	$ 66,297	$ 52,268
Aerospace [Member]
Contract With Customer Noncash Consideration [Line Items]
Revenue recognized related to noncash consideration	68,059	61,323	50,329
Industrial [Member]
Contract With Customer Noncash Consideration [Line Items]
Revenue recognized related to noncash consideration	$ 3,089	$ 4,974	$ 1,939

X

- Definition

Consideration recognized as revenue when customers trade in used products in exchange for new or refurbished products or provide inventory to the company which will be integrated into final products sold to those customers. The company obtains control of these exchanged products and customer provided inventory.

+ References

No definition available.

+ Details

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Namespace Prefix:	wwd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Contract with customer noncash consideration.

+ References

No definition available.

+ Details

Name:	wwd_ContractWithCustomerNoncashConsiderationLineItems
Namespace Prefix:	wwd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wwd_AerospaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=wwd_IndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: