UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2016	$ 4,624	$ 1	$ 6,284	$ (7,224)	$ 6,218	$ (726)	$ 71
Beginning Balance (in shares) at Dec. 31, 2016		77.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	168				164		4
Other comprehensive income	28					28
Distributions to noncontrolling interests	(4)						(4)
Cash dividends declared	(59)				(59)
Shares issued:
Employee savings plans	36		36
Employee savings plans (in shares)		0.2
Exercise of stock options	13		13
Exercise of stock options (in shares)		0.2
Employee stock purchase plan	0		0
Employee stock purchase plan (in shares)		0.1
Vesting of restricted stock and performance units	0
Vesting of restricted stock and performance units (in shares)		0.3
Repurchases of common stock to satisfy tax withholding obligations	(18)		(18)
Repurchases of common stock to satisfy tax withholding obligations (in shares)		(0.1)
Stock-based compensation expense	14		14
Ending Balance at Mar. 31, 2017	4,802	$ 1	6,329	(7,224)	6,323	(698)	71
Ending Balance (in shares) at Mar. 31, 2017		77.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment of ASC 606 on January 1, 2018, net of taxes	13				13
Beginning Balance at Dec. 31, 2017	5,151	$ 1	6,518	(7,404)	6,659	(691)	68
Beginning Balance (in shares) at Dec. 31, 2017		77.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	208				203		5
Other comprehensive income	46					46
Distributions to noncontrolling interests	(6)						(6)
Cash dividends declared	(63)				(63)
Shares issued:
Employee savings plans	34		34
Employee savings plans (in shares)		0.2
Exercise of stock options	55		55
Exercise of stock options (in shares)		0.6
Employee stock purchase plan	0		0
Employee stock purchase plan (in shares)		0.1
Vesting of restricted stock and performance units	0
Vesting of restricted stock and performance units (in shares)		0.3
Repurchases of common stock to satisfy tax withholding obligations	(23)		(23)
Repurchases of common stock to satisfy tax withholding obligations (in shares)		(0.1)
Stock-based compensation expense	20		20
Treasury stock purchased	(119)			(119)
Treasury stock purchased (in shares)		(0.6)
Other	4		2		2
Ending Balance at Mar. 30, 2018	$ 5,320	$ 1	$ 6,606	$ (7,523)	$ 6,814	$ (645)	$ 67
Ending Balance (in shares) at Mar. 30, 2018		78.4