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Summary of Restricted Stock Unit Activity (Parenthetical) (Detail) | Feb. 02, 2014
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Market value on the last business day of the fiscal year | 54.52

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- Details
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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
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Namespace Prefix: | wsm_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant