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Property and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
Feb. 01, 2015
Feb. 02, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,269,477us-gaap_PropertyPlantAndEquipmentGross $ 2,231,768us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation (1,386,465)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (1,382,475)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property and equipment, net 883,012us-gaap_PropertyPlantAndEquipmentNet 849,293us-gaap_PropertyPlantAndEquipmentNet
Leasehold Improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 852,372us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
847,351us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Fixtures and Equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 691,001us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= wsm_FixturesAndEquipmentMember
698,275us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= wsm_FixturesAndEquipmentMember
Capitalized Software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 431,259us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
419,432us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Land and buildings    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 192,841us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndBuildingMember
188,498us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndBuildingMember
Corporate systems projects in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross 91,885us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= wsm_CorporateSystemsProjectsInProgressMember
[1] 72,693us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= wsm_CorporateSystemsProjectsInProgressMember
[1]
Construction in progress    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 10,119us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
[2] $ 5,519us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
[2]
[1] Corporate systems projects in progress as of February 1, 2015 and February 2, 2014 include approximately $56.8 million and $40.1 million, respectively, for the portion of our new inventory and order management system currently under development and not ready for its intended use.
[2] Construction in progress primarily consists of leasehold improvements and furniture and fixtures related to new, expanded or remodeled retail stores where construction had not been completed as of year-end.