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, 2013	$ 6,056	$ 1	$ 5,652	$ (5,288)	$ 5,726	$ (110)	$ 75
Beginning Balance, Shares at Dec. 31, 2013		85.8
Class of Stock [Line Items]
Net (loss) income	470				461		9
Other comprehensive loss	(50)					(50)
Distributions to noncontrolling interests	(8)						(8)
Cash dividends declared on common stock	(159)				(159)
Shares issued:
Employee savings plans	105		105
Employee savings plans, Shares		1.0
Exercise of stock options	102		102
Exercise of stock options, Shares		1.1
Employee stock purchase plan	18		18
Employee stock purchase plan, Shares		0.3
Vesting of restricted stock units	0	$ 0	0	0	0	0	0
Vesting of restricted stock units, Shares		0.7
Employee restricted stock units surrendered in lieu of income tax withholding	(27)		(27)
Employee restricted stock units surrendered in lieu of income tax withholding, Shares		(0.2)
Stock-based compensation expense	39		39
Treasury stock purchased	(413)			(413)
Treasury stock purchased, Shares		(3.6)
Retirement of Convertible Contingent Debt Securities	(160)		(160)
Other	6		6
Other, Shares
Ending Balance at Sep. 26, 2014	5,979	$ 1	5,735	(5,701)	6,028	(160)	76
Ending Balance, Shares at Sep. 26, 2014		85.1
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 (loss) income	(63)				(74)		11
Other comprehensive 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 units	0	$ 0	0	0	0	0	0
Vesting of restricted stock units, Shares		0.7
Employee restricted stock units surrendered in lieu of income tax withholding	(33)		(33)
Employee restricted stock units surrendered in lieu of income tax withholding, 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