v3.25.3
Receivables and Related Allowance for Credit Losses - Schedule of Equipment Installment Plan Receivables by Credit Category (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]    
EIP receivables, net of unamortized imputed discount $ 7,257 $ 6,878
Prime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 3,471  
Originated in 2024 2,138  
Originated prior to 2024 262  
EIP receivables, net of unamortized imputed discount 5,871  
Subprime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 835  
Originated in 2024 513  
Originated prior to 2024 38  
EIP receivables, net of unamortized imputed discount 1,386  
Current - 30 days past due    
Financing Receivable, Credit Quality Indicator [Line Items]    
EIP receivables, net of unamortized imputed discount 7,106  
Current - 30 days past due | Prime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 3,439  
Originated in 2024 2,111  
Originated prior to 2024 258  
EIP receivables, net of unamortized imputed discount 5,808  
Current - 30 days past due | Subprime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 788  
Originated in 2024 476  
Originated prior to 2024 34  
EIP receivables, net of unamortized imputed discount 1,298  
31 - 60 days past due    
Financing Receivable, Credit Quality Indicator [Line Items]    
EIP receivables, net of unamortized imputed discount 63  
31 - 60 days past due | Prime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 16  
Originated in 2024 10  
Originated prior to 2024 1  
EIP receivables, net of unamortized imputed discount 27  
31 - 60 days past due | Subprime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 21  
Originated in 2024 14  
Originated prior to 2024 1  
EIP receivables, net of unamortized imputed discount 36  
61 - 90 days past due    
Financing Receivable, Credit Quality Indicator [Line Items]    
EIP receivables, net of unamortized imputed discount 44  
61 - 90 days past due | Prime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 7  
Originated in 2024 9  
Originated prior to 2024 2  
EIP receivables, net of unamortized imputed discount 18  
61 - 90 days past due | Subprime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 14  
Originated in 2024 11  
Originated prior to 2024 1  
EIP receivables, net of unamortized imputed discount 26  
More than 90 days past due    
Financing Receivable, Credit Quality Indicator [Line Items]    
EIP receivables, net of unamortized imputed discount 44  
More than 90 days past due | Prime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 9  
Originated in 2024 8  
Originated prior to 2024 1  
EIP receivables, net of unamortized imputed discount 18  
More than 90 days past due | Subprime    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated in 2025 12  
Originated in 2024 12  
Originated prior to 2024 2  
EIP receivables, net of unamortized imputed discount $ 26