Acquisitions, Divestitures, Goodwill and Intangible Assets - Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,844		$ 2,915
Accumulated Amortization	(1,627)		(1,532)
Net Carrying Amount	1,217		1,383
Impairment of the contract and program intangible asset	0		2,295		111
Contract and Program Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,042	[1]	2,066	[1]
Accumulated Amortization	(1,273)	[1]	(1,165)	[1]
Net Carrying Amount	769	[1]	901	[1]
Tradenames and Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	507		494
Accumulated Amortization	(103)		(87)
Net Carrying Amount	404		407
Technology and Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	140		180
Accumulated Amortization	(97)		(108)
Net Carrying Amount	43		72
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	155		175
Accumulated Amortization	(154)		(172)
Net Carrying Amount	1		3
Aerospace | Contract and Program Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of the contract and program intangible asset			191		111
Information Systems and Technology
Finite-Lived Intangible Assets [Line Items]
Percentage of expected cash flows exceeding carrying value			15.00%
Information Systems and Technology | Contract and Program Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of the contract and program intangible asset			110
Combat Systems
Finite-Lived Intangible Assets [Line Items]
Percentage of expected cash flows exceeding carrying value	10.00%
Combat Systems | Contract and Program Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets, estimated future impairment	$ 175

[1] Consists of acquired backlog and probable follow-on work and related customer relationships.