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v2.4.1.9

Accounting for Leases - Additional Information (Detail) | 12 Months Ended
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Feb. 01, 2015 Y
Accounting For Leases [Line Items] |
Maximum optional renewal period under operating leases, years | 20 wsm_MaximumOptionalRenewalPeriodUnderOperatingLeasesYears
Minimum |
Accounting For Leases [Line Items] |
Operating lease term, years | 3 wsm_OperatingLeaseTermYear / us-gaap_RangeAxis = us-gaap_MinimumMember
Maximum |
Accounting For Leases [Line Items] |
Operating lease term, years | 22 wsm_OperatingLeaseTermYear / us-gaap_RangeAxis = us-gaap_MaximumMember

X
- Details
Name: | wsm_AccountingForLeasesLineItems
Namespace Prefix: | wsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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

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