Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) available to common shareholders	$ (22)	$ 48	$ (210)	$ (61)	$ 26	$ (271)
Weighted average common shares outstanding (in shares)	488.4		487.3		488.2	487.0
Assumed conversion of dilutive common stock equivalents (in shares)	0.0		0.0		3.9	0.0
Diluted weighted average shares outstanding (in shares)	488.4		487.3		492.1	487.0
Basic (usd per share)	$ (0.04)		$ (0.43)		$ 0.05	$ (0.56)
Diluted (usd per share)	$ (0.04)		$ (0.43)		$ 0.05	$ (0.56)
Antidilutive shares not included in calculating diluted earnings per share (in shares)	3.2		4.2		1.6	4.3