Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non-Controlling Interest
Balance at Dec. 31, 2016	$ 2,207	$ 2	$ 1,876	$ 1,033	$ (318)	$ (403)	$ 17
Stockholders' Equity [Roll Forward]
Net income	330			331			(1)
Other comprehensive loss, net	108				108
Dividends declared	(130)			(130)
Stock incentive plan activity	31		36			(5)
Repurchase of common stock	(20)					(20)
Balance at Dec. 31, 2017	2,519	2	1,912	1,227	(210)	(428)	16
Stockholders' Equity [Roll Forward]
Net income	549			549
Other comprehensive loss, net	(111)				(109)		(2)
Dividends declared	(151)			(151)
Stock incentive plan activity	29		38			(9)
Repurchase of common stock	(50)					(50)
Balance at Dec. 31, 2018	2,782	2	1,950	1,639	(336)	(487)	14
Stockholders' Equity [Roll Forward]
Cumulative effect of change in accounting principle					(17)
Net income	401			401
Other comprehensive loss, net	(38)				(39)		1
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(3)						(3)
Dividends declared	(174)			(174)
Stock incentive plan activity	26		41			(15)
Noncontrolling Interest, Decrease from Deconsolidation	(2)						(2)
Repurchase of common stock	(25)					(25)
Balance at Dec. 31, 2019	$ 2,967	$ 2	$ 1,991	$ 1,866	$ (375)	$ (527)	$ 10