Earnings Per Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Feb. 09, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income available to common stockholders, basic	$ 5,383	$ 945	$ 2,419	$ 4,869
Net income (loss) available to common stockholders, diluted	$ 5,383	$ 945	$ 2,419	$ 4,869
Weighted average common shares outstanding, basic (in shares)	9,781	101,754	132,840	125,785
Effect of potentially dilutive securities
Preferred stock (in shares)	290	0	0	0
Warrants (in shares)	0	14,376	9,750	19,734
Restricted stock units (in shares)	0	200	338	395
Performance share units (in shares)	0	11	48	47
Weighted average common shares outstanding, diluted (in shares)	10,071	116,341	142,976	145,961
Earnings per common share:
Basic (in dollars per share)	$ 550.35	$ 9.29	$ 18.21	$ 38.71
Diluted (in dollars per share)	$ 534.51	$ 8.12	$ 16.92	$ 33.36