Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions		Total	Common Stock [member]	Additional Paid-in Capital [member]	Retained Earnings [member]	Accumulated Other Comprehensive (Loss) Income [member]	Non-Controlling Interests [member]
Balance at Dec. 31, 2018		$ 5,586	$ 2	$ 3,589	$ 2,047	$ (6)	$ (46)
Balance (shares) at Dec. 31, 2018			201,000,000
Share-based compensation, net		(1)		(1)
Net income (loss)		97			96		1
Dividends and dividend equivalents	[1]	(91)			(91)
Distributions to noncontrolling interests		(3)					(3)
Cumulative effect of change in accounting principle		(8)			(8)
Balance at Mar. 31, 2019		5,580	$ 2	3,588	2,044	(6)	(48)
Balance (shares) at Mar. 31, 2019			201,000,000
Balance at Dec. 31, 2019		$ 6,451	$ 2	4,575	1,922	(3)	(45)
Balance (shares) at Dec. 31, 2019		239,386,877	239,000,000
Share-based compensation, net		$ (4)		(5)	1
Net income (loss)		(689)			(688)		(1)
Other comprehensive loss		(2)				(2)
Dividends and dividend equivalents	[1]	(106)			(106)
Distributions to noncontrolling interests		(1)					(1)
Repurchase of common stock		(66)		(66)
Repurchases of common stock (Shares)			(4,000,000)
Balance at Mar. 31, 2020		$ 5,583	$ 2	$ 4,504	$ 1,129	$ (5)	$ (47)
Balance (shares) at Mar. 31, 2020		235,427,598	235,000,000

[1] Dividends declared per common share were $0.45 for both the three months ended March 31, 2020 and 2019, respectively.