v3.25.4
Sales of Certain Receivables - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Nov. 01, 2024
Variable Interest Entity [Line Items]        
Losses from sales of receivables $ 58 $ 62 $ 165  
Variable Interest Entity, Primary Beneficiary | Variable Interest Entity, Primary Beneficiary        
Variable Interest Entity [Line Items]        
Gross receivables       $ 193
Variable Interest Entity, Primary Beneficiary | Collateral Pledged | Service Receivable Sale Arrangement        
Variable Interest Entity [Line Items]        
Gross receivables 266 286    
EIP Securitization Arrangement        
Variable Interest Entity [Line Items]        
Revolving receivables facility, maximum borrowing capacity 1,300 1,300    
Factoring Arrangement | Variable Interest Entity, Not Primary Beneficiary        
Variable Interest Entity [Line Items]        
Revolving receivables facility, maximum borrowing capacity 950      
Revolving receivables facility, outstanding borrowings 775 775    
Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary        
Variable Interest Entity [Line Items]        
Gross EIP receivables       $ 604
Losses from sales of receivables 58 62 $ 165  
Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Collateral Pledged | EIP Sale Arrangement        
Variable Interest Entity [Line Items]        
Gross EIP receivables 535 505    
Factoring and EIP Securitization Arrangement | Level 3 | Carrying Amount | Variable Interest Entity, Primary Beneficiary        
Variable Interest Entity [Line Items]        
Carrying amounts of deferred purchase price assets $ 130 $ 148