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Segment Information (Consolidated Total Assets, Depreciation and Amortization, and Capital Expenditures by Segment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Assets	$ 2,354,659us-gaap_Assets	$ 2,397,202us-gaap_Assets
Property, plant and equipment, net	566,273us-gaap_PropertyPlantAndEquipmentNet	513,279us-gaap_PropertyPlantAndEquipmentNet
Aerospace [Member]
Assets	1,438,631us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember	1,440,355us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Energy [Member]
Assets	622,322us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember	610,345us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember
Unallocated Corporate [Member]
Assets	218,962us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember	273,510us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember
Property, plant and equipment, net	74,744us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember	72,992us-gaap_PropertyPlantAndEquipmentNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember
Total of Reporting Segments [Member]
Assets	$ 2,060,953us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember	$ 2,050,700us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 18

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Paragraph 13

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

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-Paragraph 8

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X

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Namespace Prefix:
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Period Type:

X

- Details

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Period Type:

X

- Details

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X

- Details

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