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Summary of Stock Option Activity (Parenthetical) (Detail)	12 Months Ended
	Feb. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage	100.00%wsm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedPercentage
Market value on the last business day of the fiscal year	78.25wsm_MarketValueOnLastBusinessDayOfFiscalYear

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- Definition

Market value on last business day of fiscal year.

+ References

No definition available.

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- Definition

Percent of share options (or share units) vested as of the balance sheet date.

+ References

No definition available.

+ Details

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