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Fair Value Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance at beginning of period $ (56) $ (15)
Realized and unrealized gains (losses): Included in income (loss) 91 (31)
Purchases, issuances, and settlements 20 (5)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 0 (24)
Transfers out of Level 3 (2) 19
Balance at end of period $ 53 $ (56)