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Schedule II - Valuation and Qualifying Accounts (Detail) - Valuation Allowance on Deferred Tax Asset [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Year $ 190 $ 181 $ 26
Additions Acquisition Beginning Balance 0 0 156
Additions Charged to Costs and Expenses 2 12 0
Additions Charged to Other Accounts 0 0 0
Deductions & Write-offs (41) (3) (1)
Balance at End of Year $ 151 $ 190 $ 181