v3.25.2
Equipment Installment Plan Financing Facility (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Long-term Debt:      
EQUIPMENT INSTALLMENT PLAN FINANCING FACILITY $ 1,306 $ 1,072  
EIP Unpaid Principal Balance 1,900 1,600  
Restricted cash $ 43 $ 47 $ 40
EIP Financing Facility      
Long-term Debt:      
Stated interest rate (percentage) 5.45% 5.78%  
EIP Financing Facility Borrowing Capacity $ 1,600