v3.25.3
Debt - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Oct. 09, 2025
Oct. 02, 2025
Aug. 29, 2025
Aug. 06, 2025
Mar. 17, 2025
Feb. 27, 2025
Jan. 31, 2025
Debt Instrument [Line Items]                      
Effective interest rate 4.20% 4.00% 4.10% 4.10%              
Weighted-average debt outstanding during period $ 83,200,000,000 $ 78,100,000,000 $ 82,100,000,000 $ 78,100,000,000              
Principal outstanding 10,027,000,000   10,027,000,000                
Principal amount repaid 1,064,000,000   1,064,000,000                
Senior Notes                      
Debt Instrument [Line Items]                      
Principal outstanding 8,027,000,000   8,027,000,000                
ABS Notes                      
Debt Instrument [Line Items]                      
Principal outstanding 1,000,000,000   1,000,000,000                
Carrying value 2,000,000,000   2,000,000,000                
Gross EIP receivables 2,600,000,000   2,600,000,000                
Proceeds from loan facility 2,000,000,000   2,000,000,000                
Loans Payable                      
Debt Instrument [Line Items]                      
Principal outstanding $ 1,000,000,000   $ 1,000,000,000                
4.625% Senior Notes Due 2033 | Subsequent Event | Senior Notes                      
Debt Instrument [Line Items]                      
Principal outstanding         $ 800,000,000            
Interest rate, stated percentage         4.625%            
4.950% Senior Notes Due 2035 | Subsequent Event | Senior Notes                      
Debt Instrument [Line Items]                      
Principal outstanding         $ 1,000,000,000            
Interest rate, stated percentage         4.95%            
5.700% Senior Notes Due 2056 | Subsequent Event | Senior Notes                      
Debt Instrument [Line Items]                      
Principal outstanding         $ 1,000,000,000            
Interest rate, stated percentage         5.70%            
7.625% Senior Notes Due 2026 | Subsequent Event | Senior Notes                      
Debt Instrument [Line Items]                      
Interest rate, stated percentage           7.625%          
Principal amount repaid           $ 1,500,000,000          
4.740% Class A Senior ABS Notes due 2029 | ABS Notes due 2029                      
Debt Instrument [Line Items]                      
Principal outstanding                   $ 500,000,000  
Interest rate, stated percentage                   4.74%  
4.340% Class A Senior ABS Notes due 2030 | ABS Notes Due 2030                      
Debt Instrument [Line Items]                      
Principal outstanding               $ 500,000,000      
Interest rate, stated percentage               4.34%      
4.927% ECA Facility due March 2036 | Loans Payable                      
Debt Instrument [Line Items]                      
Principal outstanding                 $ 1,000,000,000.0    
Interest rate, stated percentage                 4.927%    
Financing commitment, amount                     $ 1,000,000,000.0
ECA Facility Due November 2036 | Loans Payable                      
Debt Instrument [Line Items]                      
Financing commitment, amount             $ 1,000,000,000