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Segment Information (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	May 03, 2015	May 04, 2014
Segment Reporting Information [Line Items]
Net revenues	$ 54.8wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries	$ 51.1wsm_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributableToForeignCountries
Long-term assets	$ 59.0wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries	$ 59.8wsm_EntityWideDisclosureOnGeographicAreasLongLivedAssetsForeignCountries

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- Details

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

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- Definition

Amount of long-lived assets located in foreign countries in total in which the entity holds assets.

+ References

No definition available.

+ Details

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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

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Namespace Prefix:	wsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration