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Cover Page - shares
 6 Months Ended
Aug. 04, 2019
Sep. 01, 2019
Cover [Abstract]    
Document Type 10-Q  
Document Period End Date Aug. 04, 2019  
Document Transition Report false  
Document Quarterly Report true  
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0000719955  
Current Fiscal Year End Date --02-02  
Entity Registrant Name WILLIAMS SONOMA INC  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Trading Symbol WSM  
Entity Shell Company false  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding   78,022,213
Entity Interactive Data Current Yes  
Entity File Number 001-14077  
Entity Tax Identification Number 94-2203880  
Entity Address, Address Line One 3250 Van Ness Avenue  
Entity Address, City or Town San Francisco  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94109  
Entity Incorporation, State or Country Code DE  
Title of 12(b) Security Common Stock  
City Area Code 415  
Local Phone Number 421-7900  
Security Exchange Name NYSE