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v2.4.1.9

Summary of Stock Option Activity (Parenthetical) (Detail) | 12 Months Ended
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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 | 78.25 wsm_MarketValueOnLastBusinessDayOfFiscalYear

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Market value on last business day of fiscal year. + References No definition available. + Details
Name: | wsm_MarketValueOnLastBusinessDayOfFiscalYear
Namespace Prefix: | wsm_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percent of share options (or share units) vested as of the balance sheet date. + References No definition available. + Details
Name: | wsm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedPercentage
Namespace Prefix: | wsm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration