SEGMENT REPORTING - Net Revenues by Segment, Footnotes (Detail) - USD ($) $ in Millions	3 Months Ended
May 02, 2021	May 03, 2020
Segment Reporting [Abstract]
Net revenues related to foreign operations	$ 99.9	$ 55.2

Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

No definition available.

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