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Segment Information (Consolidated Net Sales and Earnings by Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 487,646us-gaap_SalesRevenueNet	$ 429,042us-gaap_SalesRevenueNet
Interest expense, net	(5,822)us-gaap_InterestRevenueExpenseNet	(6,003)us-gaap_InterestRevenueExpenseNet
Consolidated earnings before income taxes	57,072us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	32,944us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Total of Reporting Segments [Member]
Net sales	487,646us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember	429,042us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember
Segment earnings (loss)	75,061wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember	49,620wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_TotalOfReportingSegmentsMember
Aerospace [Member]
Net sales	255,770us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember	229,872us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Segment earnings (loss)	35,793wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember	22,549wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_AerospaceMember
Energy [Member]
Net sales	231,876us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember	199,170us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember
Segment earnings (loss)	39,268wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember	27,071wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = wwd_EnergyMember
Unallocated Corporate [Member]
Segment earnings (loss)	$ (12,167)wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember	$ (10,673)wwd_IncomeLossFromContinuingOperationsBeforeIncomeTaxesInterestMinorityInterestAndIncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateNonSegmentMember

X

- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

+ References

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

-Publisher FASB

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-Topic 235

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-Section S99

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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

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