Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Feb. 03, 2018
Mar. 29, 2018
Jul. 28, 2017
Document And Entity Information      
Entity Registrant Name Ulta Beauty, Inc.    
Entity Central Index Key 0001403568    
Document Type 10-K    
Document Period End Date Feb. 03, 2018    
Amendment Flag false    
Current Fiscal Year End Date --02-03    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 9,854,201,000
Entity Common Stock, Shares Outstanding   60,611,334  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Trading Symbol ULTA