Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Jan. 28, 2017
Mar. 23, 2017
Jul. 29, 2016
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jan. 28, 2017    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Trading Symbol ULTA    
Entity Registrant Name Ulta Beauty, Inc.    
Entity Central Index Key 0001403568    
Current Fiscal Year End Date --01-28    
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   62,132,265  
Entity Public Float     $ 10,919,168,000