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Accounting for Leases - Additional Information (Detail) | 12 Months Ended
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Jan. 31, 2016
Accounting For Leases [Line Items] |
Maximum optional renewal period under operating leases, years | 20 years
Minimum |
Accounting For Leases [Line Items] |
Operating lease term, years | 3 years
Maximum |
Accounting For Leases [Line Items] |
Operating lease term, years | 22 years

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- Definition Accounting For Leases [Line Items] + References No definition available. + Details
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Namespace Prefix: | wsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maximum optional renewal period under operating leases, years. + References No definition available. + Details
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Namespace Prefix: | wsm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Original operating lease term. + References No definition available. + Details
Name: | wsm_OperatingLeaseTermYear
Namespace Prefix: | wsm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |