Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Feb. 02, 2019
Mar. 28, 2019
Aug. 03, 2018
Document And Entity Information      
Entity Registrant Name Ulta Beauty, Inc.    
Entity Central Index Key 0001403568    
Document Type 10-K    
Document Period End Date Feb. 02, 2019    
Amendment Flag false    
Current Fiscal Year End Date --02-02    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 10,735,950,000
Entity Common Stock, Shares Outstanding   58,803,744  
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Trading Symbol ULTA