v3.25.3
Debt - Schedule of Variable Interest Entities (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Equipment installment plan receivables, net $ 4,599 $ 4,379
Equipment installment plan receivables due after one year, net 2,316 2,209
Other current assets 5,212 1,853
Accounts payable and accrued liabilities 9,193 8,463
Short-term debt 6,333 4,068
Variable Interest Entity, Primary Beneficiary    
Debt Instrument [Line Items]    
Equipment installment plan receivables, net 1,810 1,472
Equipment installment plan receivables due after one year, net 595 352
Other current assets 227 151
Accounts payable and accrued liabilities 3 2
Short-term debt 364 570
Long-term debt $ 1,629 $ 996