Employee and Retiree Benefits (Postretirement Narrative) (Details)	12 Months Ended
Aug. 25, 2018
Retirement Benefits [Abstract]
Postretirement health care benefits age requirement before distribution occurs	55 years
Postretirement health care benefits continuous service requirement	15 years

Defined Benefit Plan, Age Requirement Before Distribution Occurs

No definition available.

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Namespace Prefix:	wgo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration