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Goodwill (Narrative) (Details)	3 Months Ended
	Sep. 30, 2015
Assumed annual compound growth rate after five or ten years	4.03%
Minimum [Member]
Weighted average cost of capital assumption	9.49%
Maximum [Member]
Weighted average cost of capital assumption	12.83%

X

- Definition

Annual compound growth rate after 5 years assumption used to calculate the terminal value of the forecasted cash flows for the annual goodwill impairment test.

+ References

No definition available.

+ Details

Name:	wwd_AnnualCompoundGrowthRate
Namespace Prefix:	wwd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average cost of capital assumption used to discount forecasted cash flows for the annual goodwill impairment test

+ References

No definition available.

+ Details

Name:	wwd_WeightedAverageCostOfCapitalAssumptionRate
Namespace Prefix:	wwd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: