Earnings Per Share - Antidilutive Securities Excluded from Computation of EPS Table (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, 2020	Dec. 31, 2019
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Net income (loss), basic	$ 5,383	$ 945	$ (9,756)	$ (416)
Net income (loss), diluted	$ 5,383	$ 945	$ (9,756)	$ (416)
Basic (in shares)	9,781	101,754	9,773	8,325
Preferred stock (in shares)	290	0	0	0
Warrants (in shares)	0	14,376	0	0
Restricted stock (in shares)	0	200	0	0
Performance share units (in shares)	0	11	0	0
Diluted (in shares)	10,071	116,341	9,773	8,325
Basic (in usd per share)	$ 550.35	$ 9.29	$ (998.26)	$ (49.97)
Diluted (in usd per share)	$ 534.51	$ 8.12	$ (998.26)	$ (49.97)