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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, 2021
Dec. 31, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance at beginning of period $ (2) $ (2)
Realized and unrealized gains (losses): Included in income (loss) (62) 0
Purchases, issuances, and settlements 13 0
Acquired derivatives (Note 3) 24 0
Transfers out of Level 3 12 0
Balance at end of period $ (15) $ (2)