CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Millions	Total	Common Stock	Additional Paid in Capital	Accumulated Loss	Accumulated Loss Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning balance at Dec. 31, 2018	$ (2,463)	$ 1	$ 835	$ (2,824)		$ (175)	$ (300)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net redemption of common stock in connection with stock options and RSUs	12		(12)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation								1
Gain (Loss) on Disposition of Stock in Subsidiary	419
Proceeds from Issuance Initial Public Offering			328					91
Stock-based compensation	34		33
Net loss	(130)			(130)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	12							12
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(118)
Other Comprehensive Income (Loss), Net of Tax	8						8
Ending balance at Dec. 31, 2019	(2,108)	1	1,208	(2,954)		(175)	(292)	104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net redemption of common stock in connection with stock options and RSUs	4		4
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation								4
Stock-based compensation	60		56
Net loss	(569)			(569)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	21							21
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(548)
Other Comprehensive Income (Loss), Net of Tax	74						74
Ending balance at Dec. 31, 2020	$ (2,524)	1	1,268	(3,529)	$ (6)	(175)	(218)	129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Net redemption of common stock in connection with stock options and RSUs	$ (20)		(20)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation								2
Stock-based compensation	91		89
Net loss				371
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest								19
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	390
Other Comprehensive Income (Loss), Net of Tax	(43)						(43)
Ending balance at Dec. 31, 2021	$ (2,106)	$ 1	$ 1,337	$ (3,158)		$ (175)	$ (261)	$ 150