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Goodwill (Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2014
Goodwill, Beginning Balance	$ 559,724us-gaap_Goodwill
Effects of Currency Translation	(1,765)us-gaap_GoodwillTranslationAdjustments
Goodwill, Ending Balance	557,959us-gaap_Goodwill
Aerospace [Member]
Goodwill, Beginning Balance	455,423us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Effects of Currency Translation	0us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Goodwill, Ending Balance	455,423us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Energy [Member]
Goodwill, Beginning Balance	104,301us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember
Effects of Currency Translation	(1,765)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember
Goodwill, Ending Balance	$ 102,536us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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

X

- Definition

Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillTranslationAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_EnergyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: