Net Income (Loss) Per Share - Reconciliation of Earnings Attributable to Common Stockholders, Basic and Diluted (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income (loss) attributable to common stockholders	$ 1,045	$ (85)	$ 1,355	$ (243)
Participating share-based earnings	(3)	0	(4)	0
Basic net income (loss) attributable to common stockholders	1,042	(85)	1,351	(243)
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities	2	0	5	0
Diluted net income (loss) attributable to common stockholders	$ 1,044	$ (85)	$ 1,356	$ (243)
Basic weighted average shares outstanding (in shares)	244	165	230	165
Contingently issuable stock-based compensation (in shares)	1	0	0	0
Convertible Notes dilution (in shares)	12	0		0
Diluted weighted average shares outstanding (in shares)	257	165	242	165