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Segment Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Feb. 01, 2015	Feb. 02, 2014	Feb. 03, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 235.8wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries	$ 215.5wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries	$ 166.6wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries
Long-term assets	$ 58.3wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries	$ 61.4wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries	$ 42.6wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- 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
Period Type:	duration