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Equipment Installment Plan Financing Facility (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Long-term Debt:    
EQUIPMENT INSTALLMENT PLAN FINANCING FACILITY $ 873 $ 0
EIP Unpaid Principal Balance 1,300  
Restricted cash $ 40  
EIP Financing Facility    
Long-term Debt:    
Stated interest rate (percentage) 6.46%  
EIP Financing Facility Borrowing Capacity $ 1,250