Condensed Consolidated Statement of Equity (Deficit) - USD ($) $ in Millions	Total	Common Stock [Member]	Paid-in Capital [Member]	Notes Receivable From Parent [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2019	$ 1,075	$ 0	$ 1,165	$ 0	$ (1)	$ (89)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	(59)	0	0	0	0	(59)
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	5	0	5	0	0	0
Other comprehensive income	(57)	0	0	0	(57)	0
Return of Capital from parent	(10)	0	0	(10)	0	0
Balance at Mar. 31, 2020	954	0	1,170	(10)	(58)	(148)
Balance at Dec. 31, 2020	823	0	1,169	0	(27)	(319)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent	11	0	0	0	0	11
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	6	0	6	0	0	0
Other comprehensive income	(4)	0	0	0	(4)	0
Return of Capital from parent	0
Settlement of affiliate loan	10
Balance at Mar. 31, 2021	$ 836	$ 0	$ 1,175	$ 0	$ (31)	$ (308)