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Accounting for Leases - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
		Jan. 28, 2018	Jan. 28, 2018	Jan. 29, 2017	Jan. 31, 2016
Accounting For Leases [Line Items]
Maximum optional renewal period under operating leases, years			20 years
Rent expense	[1]		$ 262,456,000	$ 252,190,000	$ 233,262,000
Partnership
Accounting For Leases [Line Items]
Lease expiration date			Jul. 31, 2017
Rent expense			$ 1,629,000	$ 1,599,000	$ 3,050,000
Extension period		1 year
Operating lease term extended expiry date		Jul. 31, 2018
Partnership | Amendment
Accounting For Leases [Line Items]
Operating lease term extended expiry date		Jul. 31, 2020
Renewal options period		1 year
Minimum
Accounting For Leases [Line Items]
Operating lease term, years			5 years
Maximum
Accounting For Leases [Line Items]
Operating lease term, years			22 years
[1] Excludes all other occupancy-related costs including depreciation, common area maintenance, property taxes and utilities.

X

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

+ Details

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Balance Type:	debit
Period Type:	duration

X

- 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

X

- Definition

The date upon which a lease or a group of leases is set to expire.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lease Extension Period

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum optional renewal period under operating leases, years.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Operating Lease Agreement Extended Expiry Date

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Original operating lease term.

+ References

No definition available.

+ Details

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Namespace Prefix:	wsm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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- Details

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