v3.26.1
Debt - Schedule of Variable Interest Entities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Equipment installment plan receivables, net $ 4,715 $ 4,997
Equipment installment plan receivables due after one year, net 2,458 2,683
Other current assets 5,764 5,372
Accounts payable and accrued liabilities 8,774 10,280
Short-term debt 6,117 5,135
Variable Interest Entity, Primary Beneficiary    
Debt Instrument [Line Items]    
Equipment installment plan receivables, net 1,801 1,865
Equipment installment plan receivables due after one year, net 598 543
Other current assets 238 232
Accounts payable and accrued liabilities 2 3
Short-term debt 580 594
Long-term debt $ 1,415 $ 1,401