Consolidated Statements of Equity - USD ($) $ in Millions	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Non-Controlling Interests	Total
Balance at Dec. 31, 2016	$ 1	$ 1,149	$ (413)	$ (1,071)	$ 2,899	$ 30
Increase (Decrease) in Stockholders' Equity
Net income					519	13	$ 532
Dividends declared					(159)	(15)
Repurchases of common stock, net			(123)
Share-based compensation, net of issuance		(11)	42
Other comprehensive income (loss)				58		(2)
Balance at Dec. 31, 2017	1	1,138	(494)	(1,013)	3,259	26
Increase (Decrease) in Stockholders' Equity
Net income					443	11	454
Dividends declared					(173)	(9)
Repurchases of common stock, net		(33)	(624)				(594)
Share-based compensation, net of issuance		(5)	27
Other comprehensive income (loss)				(134)		(7)
Other		(4)		(7)	7	(1)
Balance at Dec. 31, 2018	1	1,096	(1,091)	(1,154)	3,536	20	2,408
Increase (Decrease) in Stockholders' Equity
Net income					413	11	424
Dividends declared					(169)	(8)
Repurchases of common stock, net		32	31
Share-based compensation, net of issuance		9	20
Other comprehensive income (loss)				(4)		(2)
Balance at Dec. 31, 2019	$ 1	$ 1,137	$ (1,040)	$ (1,158)	$ 3,780	$ 21	$ 2,741