Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Nov. 03, 2018
Dec. 04, 2018
Document And Entity Information    
Entity Registrant Name Ulta Beauty, Inc.  
Entity Central Index Key 0001403568  
Document Type 10-Q  
Document Period End Date Nov. 03, 2018  
Amendment Flag false  
Current Fiscal Year End Date --02-02  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   59,312,145
Entity Small Business false  
Entity Emerging Growth Company false  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Trading Symbol ULTA