Loss Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Loss available to common stockholders	$ (1,377)	$ (1,357)
Weighted-average shares outstanding, basic (in shares)	325,000	316,600
Weighted-average shares outstanding, diluted (in shares)	325,000	316,600
Loss per share, basic (in dollars per share)	$ (4.24)	$ (4.29)
Loss per share, diluted (in dollars per share)	$ (4.24)	$ (4.29)
Stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	1,500	0
Employee stock awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities	700	700