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Revenue (Schedule of Revenue Recognized Related to Noncash Consideration) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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
Name: | wwd_ContractWithCustomerNoncashConsideration
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: |