Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
Valuation and Qualifying Accounts | |||
Balance at beginning of period | $ 123 | $ 100 | $ 98 |
Additions Charged to Costs and Expenses | 94 | 51 | 37 |
Deductions | 26 | 28 | 35 |
Balance at end of period | 191 | 123 | 100 |
Valuation allowance for deferred tax assets | |||
Valuation and Qualifying Accounts | |||
Balance at beginning of period | 90 | 73 | 69 |
Additions Charged to Costs and Expenses | 69 | 30 | 19 |
Deductions | 6 | 13 | 15 |
Balance at end of period | 153 | 90 | 73 |
Allowance for obsolete inventory parts | |||
Valuation and Qualifying Accounts | |||
Balance at beginning of period | 29 | 24 | 27 |
Additions Charged to Costs and Expenses | 6 | 5 | 4 |
Deductions | 0 | 0 | 7 |
Balance at end of period | 35 | 29 | 24 |
Allowance for doubtful accounts | |||
Valuation and Qualifying Accounts | |||
Balance at beginning of period | 4 | 3 | 2 |
Additions Charged to Costs and Expenses | 19 | 16 | 14 |
Deductions | 20 | 15 | 13 |
Balance at end of period | $ 3 | $ 4 | $ 3 |