Retirement Benefits (Schedule of Accumulated Benefit Obligations In Excess of and Less Than Fair Value of Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Plans with accumulated benefit obligation in excess of plan assets
Projected benefit obligation, plans with ABO in excess of plan assets	$ (25,955)	$ (38,473)
Accumulated benefit obligation, plans with ABO in excess of plan assets	(25,955)	(36,739)
Fair value of plan assets, plans with ABO in excess of plan assets	24,671	34,717
Plans with accumulated benefit obligation less than plan assets
Projected benefit obligation, plans with ABO less than plan assets	(175,320)	(151,950)
Accumulated benefit obligation, plans with ABO less than plan assets	(172,509)	(140,023)
Fair value of plan assets, plans with ABO less than plan assets	$ 180,490	$ 155,458

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 55

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=34716465&loc=d3e4179-114921

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2417-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

+ Details

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

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References

+ Details

Name:	us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations less than plan assets as of the measurement date of each statement of financial position presented.

+ References

No definition available.

+ Details

Name:	wwd_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsLessThanPlanAssetsAggregateAccumulatedBenefitObligation
Namespace Prefix:	wwd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations less than plan assets as of the measurement date of each statement of financial position presented.

+ References

No definition available.

+ Details

Name:	wwd_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsLessThanPlanAssetsAggregateFairValueOfPlanAssets
Namespace Prefix:	wwd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations less than plan assets as of the measurement date of each statement of financial position presented.

+ References

No definition available.

+ Details

Name:	wwd_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsLessThanPlanAssetsAggregateProjectedBenefitObligation
Namespace Prefix:	wwd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Details

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