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Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Parenthetical) (Detail) - Held for Sale - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]    
Derivative asset held for sale, current $ 54 $ 118
Derivative asset held for sale, non current   1
Derivative liabilities held for sale, current $ 30 6
Derivative liabilities held for sale, non current   $ 1