XML 13 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2022
Apr. 30, 2022
Document Information [Line Items]    
Document Type 10-QT  
Document Quarterly Report false  
Document Transition Report true  
Document Period Start Date Jan. 01, 2022  
Document Period End Date Mar. 31, 2022  
Entity File Number 001-33202  
Entity Registrant Name UNDER ARMOUR, INC.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 52-1990078  
Entity Address, Address Line One 1020 Hull Street  
Entity Address, City or Town Baltimore  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 21230  
City Area Code 410  
Local Phone Number 468-2512  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001336917  
Class A Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Class A Common Stock  
Trading Symbol UAA  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   188,668,560
Class C Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Class C Common Stock  
Trading Symbol UA  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   238,495,475
Class B Convertible Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   34,450,000