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Schedule II—Valuation and Qualifying Account (Details) - Valuation Allowance on Deferred Tax Assets - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 364 $ 3,166 $ 3,264
Charged to Expenses 31 95 0
Credited to Expenses 0 (2,897) (98)
Balance at End of Year $ 395 $ 364 $ 3,166