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Fair Value Measurements - Reconciliation of Changes in Fair Value of Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy    
Balance at beginning of period $ 92 $ 146
Total gain (loss) included in earnings 0 138
Settlement (gain) loss (26) (100)
Transfers in and/or out of Level 3 0 0
Balance at end of period 66 184
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period $ (1) $ 95
Fair value recurring basis unobservable input reconciliation net derivative asset liability gain loss statement of income extensible list not disclosed flag Total gain (loss) included in earnings Total gain (loss) included in earnings