Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Parent [Member]
Balance at period start at Dec. 31, 2019		$ 2	$ 3,890	$ (2,185)	$ (407)	$ 1,300
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Preferred Stock				(2)		(2)
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised			1			1
Net income (loss)	$ (49)			(49)		(49)
Other Comprehensive Income (Loss), Net of Tax	(30)				(30)	(30)
Comprehensive Loss, Net	(79)			(49)	(30)	(79)
Balance at period end at Mar. 31, 2020		2	3,891	(2,236)	(437)	1,220
Balance at period start at Dec. 31, 2020	1,190	2	3,899	(2,313)	(398)	1,190
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends, Preferred Stock				(2)		(2)
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised			3			3
Net income (loss)	(11)			(11)		(11)
Other Comprehensive Income (Loss), Net of Tax	(12)				(12)	(12)
Comprehensive Loss, Net	(23)			(11)	(12)	(23)
Balance at period end at Mar. 31, 2021	$ 1,168	$ 2	$ 3,902	$ (2,326)	$ (410)	$ 1,168