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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Valuation and Qualifying Accounts      
Balance at beginning of period $ 191 $ 123 $ 100
Additions Charged to Costs and Expenses 137 94 51
Deductions 41 26 28
Balance at end of period 287 191 123
Valuation allowance for deferred tax assets      
Valuation and Qualifying Accounts      
Balance at beginning of period 153 90 73
Additions Charged to Costs and Expenses 126 69 30
Deductions 41 6 13
Balance at end of period 238 153 90
Allowance for obsolete inventory parts      
Valuation and Qualifying Accounts      
Balance at beginning of period 35 29 24
Additions Charged to Costs and Expenses 8 6 5
Deductions 0 0 0
Balance at end of period 43 35 29
Allowance for credit losses      
Valuation and Qualifying Accounts      
Balance at beginning of period 3 4 3
Additions Charged to Costs and Expenses 3 19 16
Deductions 0 20 15
Balance at end of period $ 6 $ 3 $ 4