v3.26.3
Sales of Certain Receivables - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Variable Interest Entity [Line Items]          
Losses from sales of receivables $ 15 $ 17 $ 52 $ 58  
EIP Securitization Arrangement          
Variable Interest Entity [Line Items]          
Revolving receivables facility, maximum borrowing capacity 1,300   1,300   $ 1,300
Factoring Arrangement | Collateral Pledged | Service Receivable Sale Arrangement          
Variable Interest Entity [Line Items]          
Gross receivables 301   301   266
Factoring Arrangement | Variable Interest Entity, Not Primary Beneficiary          
Variable Interest Entity [Line Items]          
Revolving receivables facility, outstanding borrowings 775   775   775
Factoring and EIP Securitization Arrangement          
Variable Interest Entity [Line Items]          
Losses from sales of receivables 15 $ 17 52 $ 58  
Factoring and EIP Securitization Arrangement | Collateral Pledged | EIP Sale Arrangement          
Variable Interest Entity [Line Items]          
Gross EIP receivables 534   534   535
Factoring and EIP Securitization Arrangement | Level 3 | Carrying Amount          
Variable Interest Entity [Line Items]          
Carrying amounts of deferred purchase price assets $ 137   $ 137   $ 130