Unaudited Condensed Consolidated Statements of Change in Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Common Stock	Additional paid in capital	Accumulated Deficit	Accumulated other comprehensive income (loss)	Noncontrolling interest	Total
Balance at the beginning of period at Dec. 31, 2019		$ 1,784	$ (1,064)	$ 41	$ 1	$ 762
Balance at the beginning of period (in shares) at Dec. 31, 2019	59.9
Increase (Decrease) in Shareholders' Equity
Common stock issued under employee stock purchase plan		2				2
Common stock issued under employee stock purchase plan (in shares)	0.2
Equity classified stock-based compensation expense		4				4
Comprehensive (loss) income			(48)	(63)		(111)
Balance at the end of period at Mar. 31, 2020		1,790	(1,112)	(22)	1	657
Balance at the end of period (in shares) at Mar. 31, 2020	60.1
Balance at the beginning of period at Dec. 31, 2019		1,784	(1,064)	41	1	762
Balance at the beginning of period (in shares) at Dec. 31, 2019	59.9
Increase (Decrease) in Shareholders' Equity
Comprehensive (loss) income						223
Balance at the end of period at Sep. 30, 2020		1,800	(723)	(79)		998
Balance at the end of period (in shares) at Sep. 30, 2020	61.0
Balance at the beginning of period at Mar. 31, 2020		1,790	(1,112)	(22)	1	657
Balance at the beginning of period (in shares) at Mar. 31, 2020	60.1
Increase (Decrease) in Shareholders' Equity
Reclassification of liability classified stock-based compensation awards to equity classified		(2)				(2)
Equity- settled stock- based compensation recovery from disposal of discontinued operations		(1)				(1)
Common stock issued under employee stock purchase plan		1				1
Common stock issued under employee stock purchase plan (in shares)	0.2
Equity classified stock-based compensation expense		6				6
Equity classified stock-based compensation expense (in shares)	0.4
Dividends			(1)			(1)
Comprehensive (loss) income			306	(64)		242
Balance at the end of period at Jun. 30, 2020		1,794	(807)	(86)	1	902
Balance at the end of period (in shares) at Jun. 30, 2020	60.7
Increase (Decrease) in Shareholders' Equity
Common stock issued under employee stock purchase plan		2				2
Common stock issued under employee stock purchase plan (in shares)	0.2
Equity classified stock-based compensation expense		4				4
Equity classified stock-based compensation expense (in shares)	0.1
Dividends			(1)			(1)
Comprehensive (loss) income			85	7		92
Other					(1)	(1)
Balance at the end of period at Sep. 30, 2020		1,800	(723)	(79)		998
Balance at the end of period (in shares) at Sep. 30, 2020	61.0
Balance at the beginning of period at Dec. 31, 2020		1,818	(763)	(120)	1	$ 936
Balance at the beginning of period (in shares) at Dec. 31, 2020	61.2					61.2
Increase (Decrease) in Shareholders' Equity
Common stock issuance, net of transaction fees		380				$ 380
Underwritten stock offering (in shares)	10.0
Common stock issued under employee stock purchase plan		2				2
Common stock issued under employee stock purchase plan (in shares)	0.1
Equity classified stock-based compensation expense		7				7
Equity classified stock-based compensation expense (in shares)	0.4
Comprehensive (loss) income			(84)	6		(78)
Balance at the end of period at Mar. 31, 2021		2,207	(847)	(114)	1	1,247
Balance at the end of period (in shares) at Mar. 31, 2021	71.7
Balance at the beginning of period at Dec. 31, 2020		1,818	(763)	(120)	1	$ 936
Balance at the beginning of period (in shares) at Dec. 31, 2020	61.2					61.2
Increase (Decrease) in Shareholders' Equity
Comprehensive (loss) income						$ (10)
Balance at the end of period at Sep. 30, 2021		2,224	(790)	(105)	1	$ 1,330
Balance at the end of period (in shares) at Sep. 30, 2021	72.6					72.6
Balance at the beginning of period at Mar. 31, 2021		2,207	(847)	(114)	1	$ 1,247
Balance at the beginning of period (in shares) at Mar. 31, 2021	71.7
Increase (Decrease) in Shareholders' Equity
Common stock issued under employee stock purchase plan		2				2
Common stock issued under employee stock purchase plan (in shares)	0.1
Equity classified stock-based compensation expense		2				2
Equity classified stock-based compensation expense (in shares)	0.6
Dividends			(1)			(1)
Comprehensive (loss) income			45	5		50
Balance at the end of period at Jun. 30, 2021		2,211	(803)	(109)	1	1,300
Balance at the end of period (in shares) at Jun. 30, 2021	72.4
Increase (Decrease) in Shareholders' Equity
Common stock issued under employee stock purchase plan		2				2
Common stock issued under employee stock purchase plan (in shares)	0.1
Equity classified stock-based compensation expense		11				11
Equity classified stock-based compensation expense (in shares)	0.1
Dividends			(1)			(1)
Comprehensive (loss) income			14	4		18
Balance at the end of period at Sep. 30, 2021		$ 2,224	$ (790)	$ (105)	$ 1	$ 1,330
Balance at the end of period (in shares) at Sep. 30, 2021	72.6					72.6