Consolidated Statement of Equity (Deficit) (Unaudited) - USD ($) $ in Millions		Total	Treasury Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Treasury Stock [Member]	Redeemable Convertible Preferred Stock [Member]	Convertible Redeemable Series B Preferred Stock [Member]	Convertible Redeemable Series C Preferred Stock [Member]
Equity (deficit) at Dec. 31, 2020		$ 77	$ 1,152	$ (620)	$ (446)	$ (9)
Equity (deficit) at Dec. 31, 2020							$ 191
Net (loss) income		6		6
Currency translation adjustments		(1)			(1)
Pension and other postretirement liability adjustments		6			6
Repurchase of Redeemable Convertible Preferred Stock							(100)
Exchange of Series A preferred stock		92	92				(92)
Expiration of Series A preferred stock embedded derivative		11	11
Issuance of common stock		10	10
Issuance of convertible, redeemable Series B preferred stock, net		(95)	(95)
Issuance of convertible, redeemable preferred stock, net								$ 93	$ 97
Preferred stock cash dividends		(1)	(1)
Preferred stock in-kind dividends		(1)	(1)
Redeemable preferred stock in-kind dividends							1
Preferred stock deemed dividends		(2)	(2)
Redeemable preferred stock deemed dividends							2
Purchase of treasury stock	[1]	(1)				(1)
Stock-based compensation		3	3
Equity (deficit) at Mar. 31, 2021		104	1,169	(614)	(441)	(10)
Equity (deficit) at Mar. 31, 2021							192
Equity (deficit) at Dec. 31, 2021		781	1,166	(596)	221	(10)
Equity (deficit) at Dec. 31, 2021		196					196
Net (loss) income		(3)		(3)
Currency translation adjustments		5			5
Preferred stock cash dividends		(1)	(1)
Preferred stock in-kind dividends		(1)	(1)
Redeemable preferred stock in-kind dividends							1
Preferred stock deemed dividends		(1)	(1)
Redeemable preferred stock deemed dividends							1
Stock-based compensation		2	2
Equity (deficit) at Mar. 31, 2022		782	$ 1,165	$ (599)	$ 226	$ (10)
Equity (deficit) at Mar. 31, 2022		$ 198					$ 198

[1] Represents purchases of common stock to satisfy tax withholding obligations.