Fair Value of Financial Instruments Unobservable Input Reconciliation (Details) - USD ($) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
Balance as of the beginning of the period | $ 45 | $ 32 |
Net realized and unrealized (gains)/losses | (2) | (11) |
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3 | 7 | |
Transfers out of Level 3 to Level 2 | 0 | |
Balance as of the end of the period | 43 | 28 |
Gain (Loss) from Price Risk Management Activity | $ 1 | $ 5 |