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, 2014	$ 5,360	$ 1	$ 5,798	$ (6,111)	$ 6,181	$ (584)	$ 75
Beginning Balance, Shares at Dec. 31, 2014		82.0
Class of Stock [Line Items]
Net income	233				225		8
Other comprehensive income	6					6
Distributions to noncontrolling interests	(8)						(8)
Cash dividends declared on common stock	(109)				(109)
Shares issued:
Employee savings plans	62		62
Employee savings plans, Shares		0.5
Exercise of stock options	62		62
Exercise of stock options, Shares		0.5
Employee stock purchase plan	17		17
Employee stock purchase plan, Shares		0.2
Vesting of restricted stock and performance units
Vesting of restricted stock and performance units, Shares		0.7
Repurchases of common stock to satisfy tax withholding obligations	(33)		(33)
Repurchases of common stock to satisfy tax withholding obligations, Shares		(0.2)
Stock-based compensation expense	24		24
Treasury stock purchased	(346)			(346)
Treasury stock purchased, Shares		(2.9)
Other	4		4
Other, Shares
Ending Balance at Jun. 26, 2015	5,272	$ 1	5,934	(6,457)	6,297	(578)	75
Ending Balance, Shares at Jun. 26, 2015		80.8
Beginning Balance at Dec. 31, 2015	4,429	$ 1	6,051	(6,851)	5,728	(574)	74
Beginning Balance, Shares at Dec. 31, 2015		78.1
Class of Stock [Line Items]
Net income	381				374		7
Other comprehensive income	30					30
Distributions to noncontrolling interests	(8)						(8)
Cash dividends declared on common stock	(110)				(110)
Shares issued:
Employee savings plans	60		60
Employee savings plans, Shares		0.5
Exercise of stock options	38		38
Exercise of stock options, Shares		0.4
Employee stock purchase plan	16		16
Employee stock purchase plan, Shares		0.2
Vesting of restricted stock and performance units
Vesting of restricted stock and performance units, Shares		0.5
Repurchases of common stock to satisfy tax withholding obligations	(20)		(20)
Repurchases of common stock to satisfy tax withholding obligations, Shares		(0.2)
Stock-based compensation expense	19		19
Treasury stock purchased	(276)			(276)
Treasury stock purchased, Shares		(2.3)
Ending Balance at Jun. 24, 2016	$ 4,559	$ 1	$ 6,164	$ (7,127)	$ 5,992	$ (544)	$ 73
Ending Balance, Shares at Jun. 24, 2016		77.2