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Supplemental Cash Flow Information Related To Our Leases (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Nov. 03, 2019 | Nov. 03, 2019
Cash paid for amounts included in the measurement of operating lease liabilities: | $ 71,136 | $ 212,530
Net additions to right-of-use assets | $ 38,311 | $ 120,704

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- Definition Cash paid for amounts included in the measurement of operating lease liabilities. + References No definition available. + Details
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Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Net additions to right-of-use asset during the period. + References No definition available. + Details
Name: | wsm_RightOfUseAssetsObtainedInExchangeForOperatingLeaseLiability
Namespace Prefix: | wsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration