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Income Taxes (Valuation Allowance) (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |
Valuation Allowances Balance | $ 1,465 | $ 842 | $ 825 | $ 757
Additions charged to income tax expense | 170 | 54 | 136 |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Reduction credited to goodwill | 0 | 0 | (19) |
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction | (58) | (82) | (37) |
Other adjustments (1) | $ 511 | $ 45 | $ (12) |

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