Condensed Consolidated Statements of Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2011	$ 6,724	$ 1	$ 5,063	$ (3,616)	$ 5,641	$ (454)	$ 89
Beginning Balance, Shares at Dec. 31, 2011		99,000,000
Net income	605				598		7
Other comprehensive income	63					63
Distributions to noncontrolling interests	(7)						(7)
Cash dividends paid on common stock	(146)				(146)
Shares issued:
Employee savings plans	111		111
Employee savings plans, Shares		1,700,000
Exercise of stock options	12		12
Exercise of stock options, Shares		200,000
Employee stock purchase plan	21		21
Employee stock purchase plan, Shares		700,000
Stock-based compensation expense	46		46
Contributions received from the spin-off of Engility	335				335
Spin-off of Engility	(1,406)				(1,393)		(13)
Treasury stock purchased	(504)			(504)
Treasury stock purchased, Shares		(7,200,000)
Other	(12)		(10)		(2)
Other, Shares		400,000
Ending Balance at Sep. 28, 2012	5,842	1	5,243	(4,120)	5,033	(391)	76
Ending Balance, Shares at Sep. 28, 2012		94,800,000
Beginning Balance at Dec. 31, 2012	5,543	1	5,313	(4,488)	5,191	(550)	76
Beginning Balance, Shares at Dec. 31, 2012		90,400,000
Net income	588				582		6
Other comprehensive income	21					21
Distributions to noncontrolling interests	(7)						(7)
Cash dividends paid on common stock	(149)				(149)
Shares issued:
Employee savings plans	97		97
Employee savings plans, Shares		1,300,000
Exercise of stock options	90		90
Exercise of stock options, Shares		1,300,000
Employee stock purchase plan	18		18
Employee stock purchase plan, Shares		500,000
Stock-based compensation expense	42		42
Treasury stock purchased	(404)			(404)
Treasury stock purchased, Shares		(4,800,000)
Other	(9)		(6)		(3)
Other, Shares		300,000
Ending Balance at Sep. 27, 2013	$ 5,830	$ 1	$ 5,554	$ (4,892)	$ 5,621	$ (529)	$ 75
Ending Balance, Shares at Sep. 27, 2013		89,000,000