v3.25.4
Document and Entity Information
Feb. 11, 2026
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0001283699
Document Type 8-K
Document Period End Date Feb. 11, 2026
Entity Registrant Name T-MOBILE US, INC.
Entity Incorporation State Country Code DE
Entity File Number 1-33409
Entity Tax Identification Number 20-0836269
Entity Address, Address Line One 12920 SE 38th Street
Entity Address, City or Town Bellevue
Entity Address, State or Province WA
Entity Address, Postal Zip Code 98006-1350
City Area Code (425)
Local Phone Number 378-4000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock Par Value 0.00001 Per Share [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, par value $0.00001 per share
Trading Symbol TMUS
Security Exchange Name NASDAQ
A 3.550 Senior Notes Due 2029 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.550% Senior Notes due 2029
Trading Symbol TMUS29
Security Exchange Name NASDAQ
A 3.700 Senior Notes Due 2032 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.700% Senior Notes due 2032
Trading Symbol TMUS32
Security Exchange Name NASDAQ
A 3.150 Senior Notes Due 2032 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.150% Senior Notes due 2032
Trading Symbol TMUS32A
Security Exchange Name NASDAQ
A 3.850 Senior Notes Due 2036 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.850% Senior Notes due 2036
Trading Symbol TMUS36
Security Exchange Name NASDAQ
A 3.500 Senior Notes Due 2037 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.500% Senior Notes due 2037
Trading Symbol TMUS37
Security Exchange Name NASDAQ
A 3.800 Senior Notes Due 2045 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 3.800% Senior Notes due 2045
Trading Symbol TMUS45
Security Exchange Name NASDAQ
A 6.250 Senior Notes Due 2069 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.250% Senior Notes due 2069
Trading Symbol TMUSL
Security Exchange Name NASDAQ
A 5.500 Senior Notes Due March 2070 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 5.500% Senior Notes due March 2070
Trading Symbol TMUSZ
Security Exchange Name NASDAQ
A 5.500 Senior Notes Due June 2070 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 5.500% Senior Notes due June 2070
Trading Symbol TMUSI
Security Exchange Name NASDAQ