v3.25.2
Document and Entity Information
Jun. 16, 2025
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0001336917
Document Type 8-K
Document Period End Date Jun. 16, 2025
Entity Registrant Name UNDER ARMOUR, INC.
Entity Incorporation State Country Code MD
Entity File Number 001-33202
Entity Tax Identification Number 52-1990078
Entity Address, Address Line One 101 Performance Drive
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
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Class A Common Stock
Trading Symbol UAA
Security Exchange Name NYSE
Common Class C [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Class C Common Stock
Trading Symbol UA
Security Exchange Name NYSE