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Summary of Stock-Settled Stock Appreciation Right Activity (Parenthetical) (Detail)	Feb. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market value on the last business day of the fiscal year	78.25wsm_MarketValueOnLastBusinessDayOfFiscalYear
Stock-Settled Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market value on the last business day of the fiscal year	78.25wsm_MarketValueOnLastBusinessDayOfFiscalYear / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember

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- Definition

Market value on last business day of fiscal year.

+ References

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