v3.3.1.900
Document and Entity Information - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2016
Mar. 24, 2016
Jul. 31, 2015
Entity Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 31, 2016    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Trading Symbol LULU    
Entity Registrant Name lululemon athletica inc.    
Entity Central Index Key 0001397187    
Current Fiscal Year End Date --01-31    
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   127,494,121  
Entity Public Float     $ 5,091,622