Consolidated Statements of Stockholders' Equity (Unaudited) Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interest
Beginning Balance at Dec. 31, 2018	$ 3,056	$ 0	$ 9,582	$ (6,542)	$ (77)	$ 93
Net income	180	0	0	175	0	5
Other comprehensive income (loss)	(23)	0	0	0	(23)	0
Other	0	0	2	0	0	(2)
Ending Balance at Mar. 31, 2019	3,213	0	9,584	(6,367)	(100)	96
Beginning Balance at Dec. 31, 2018	3,056	0	9,582	(6,542)	(77)	93
Net income	450
Other comprehensive income (loss)	(53)
Ending Balance at Jun. 30, 2019	3,453	0	9,584	(6,101)	(129)	99
Beginning Balance at Mar. 31, 2019	3,213	0	9,584	(6,367)	(100)	96
Net income	270	0	0	266	0	4
Other comprehensive income (loss)	(30)	0	0	0	(29)	(1)
Ending Balance at Jun. 30, 2019	3,453	0	9,584	(6,101)	(129)	99
Beginning Balance at Dec. 31, 2019	2,658	0	9,584	(6,923)	(114)	111
Net income	130	0	0	128	0	2
Other comprehensive income (loss)	(108)	0	0	0	(108)	0
Acquisition of noncontrolling interest (Note 3)	(49)	0	(67)	0	3	113
Ending Balance at Mar. 31, 2020	2,631	0	9,651	(6,795)	(225)	0
Beginning Balance at Dec. 31, 2019	2,658	0	9,584	(6,923)	(114)	111
Net income	293
Other comprehensive income (loss)	(103)
Ending Balance at Jun. 30, 2020	2,799	0	9,651	(6,632)	(220)	0
Beginning Balance at Mar. 31, 2020	2,631	0	9,651	(6,795)	(225)	0
Net income	163	0	0	163	0	0
Other comprehensive income (loss)	5	0	0	0	5	0
Ending Balance at Jun. 30, 2020	$ 2,799	$ 0	$ 9,651	$ (6,632)	$ (220)	$ 0