Intangible Assets, Net (Narrative) (Details)	Jul. 31, 2019
Intangible Assets, Net
Weighted average cost of capital assumption	10.44%
Assumed annual compound growth rate after ten years	3.39%

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.

No definition available.

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