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 (loss)	(63)				(74)		11
Other comprehensive income (loss)	(46)					(46)
Distributions to noncontrolling interests	(11)						(11)
Cash dividends declared on common stock	(162)				(162)
Shares issued:
Employee savings plans	95		95
Employee savings plans, Shares		0.8
Exercise of stock options	65		65
Exercise of stock options, Shares		0.6
Employee stock purchase plan	17		17
Employee stock purchase plan, Shares		0.3
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	36		36
Treasury stock purchased	(605)			(605)
Treasury stock purchased, Shares		(5.2)
Other	6		6
Other, Shares
Ending Balance at Sep. 25, 2015	4,659	$ 1	5,984	(6,716)	5,945	(630)	75
Ending Balance, Shares at Sep. 25, 2015		79.0
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 (loss)	532				522		10
Other comprehensive income (loss)	7					7
Distributions to noncontrolling interests	(12)						(12)
Cash dividends declared on common stock	(165)				(165)
Shares issued:
Employee savings plans	94		94
Employee savings plans, Shares		0.7
Exercise of stock options	49		49
Exercise of stock options, Shares		0.6
Employee stock purchase plan	16		16
Employee stock purchase plan, Shares		0.4
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	34		34
Treasury stock purchased	(326)			(326)
Treasury stock purchased, Shares		(2.7)
Other	2				2
Other, Shares
Ending Balance at Sep. 23, 2016	$ 4,640	$ 1	$ 6,224	$ (7,177)	$ 6,087	$ (567)	$ 72
Ending Balance, Shares at Sep. 23, 2016		77.4