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Segment Information (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2016 | Feb. 01, 2015 | Feb. 02, 2014
Segment Reporting Information [Line Items] |  |  |
Net revenues related to foreign operations | $ 298.9 | $ 235.8 | $ 215.5
Long-term assets related to foreign operations | $ 61.7 | $ 58.3 | $ 61.4

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of long-lived assets located in foreign countries in total in which the entity holds assets. + References No definition available. + Details
Name: | wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues. + References No definition available. + Details
Name: | wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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