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Document and Entity Information (USD $)
 12 Months Ended
Feb. 01, 2015
Mar. 30, 2015
Aug. 03, 2014
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Feb. 01, 2015    
Document Fiscal Year Focus 2014    
Document Fiscal Period Focus FY    
Trading Symbol WSM    
Entity Registrant Name WILLIAMS SONOMA INC    
Entity Central Index Key 0000719955    
Current Fiscal Year End Date --02-01    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   91,642,370dei_EntityCommonStockSharesOutstanding  
Entity Public Float     $ 6,206,368,000dei_EntityPublicFloat