Annual report pursuant to Section 13 and 15(d)

Business and Basis of Presentation - Additional Information (Detail)

v2.4.1.9
Business and Basis of Presentation - Additional Information (Detail)
12 Months Ended
Jan. 31, 2015
Segment
Store
State
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Number of stores 774us-gaap_NumberOfStores
Number of states in which entity operates 47us-gaap_NumberOfStatesInWhichEntityOperates
Number of operating segments 3ulta_NumberOfSegmentsInWhichEntityOperates
Number of reportable segments 1us-gaap_NumberOfReportableSegments