XML 86 R69.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee and Retiree Benefits (Postretirement Narrative) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013 | Jan. 31, 2012 | Aug. 26, 2017 | Aug. 27, 2016
Retirement Benefits [Abstract] |  |  |  |  |  |  |
Postretirement health care benefits age requirement before distribution occurs |  |  |  |  |  | 55 years |
Postretirement health care benefits continuous service requirement |  |  |  |  |  | 15 years |
Accumulated postretirement benefit obligation discount rate |  |  |  |  |  |  | 2.73%
Actuarial loss |  |  |  |  |  | $ 0 | $ 850
Dollar cap liability reduction | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% | 10.00% |
Defined Benefit Plan, Retiree Age Requirement |  |  |  |  |  | 65 years |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanActuarialGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Defined Benefit Plan, Age Requirement Before Distribution Occurs + References No definition available. + Details
Name: | wgo_DefinedBenefitPlanAgeRequirementBeforeDistributionOccurs
Namespace Prefix: | wgo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Dollar Cap Liability Reduction + References No definition available. + Details
Name: | wgo_DefinedBenefitPlanDollarCapLiabilityReduction
Namespace Prefix: | wgo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Retiree Age Requirement + References No definition available. + Details
Name: | wgo_DefinedBenefitPlanRetireeAgeRequirement
Namespace Prefix: | wgo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined Benefit Plan, Service Requirement + References No definition available. + Details
Name: | wgo_DefinedBenefitPlanServiceRequirement
Namespace Prefix: | wgo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration