Business Group Information - Segment Reporting Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 31,218		$ 31,513		$ 32,677
Operating earnings	3,685		833		3,826
Identifiable Assets	35,448		34,309		34,883
Capital Expenditures	440		450		458
Depreciation and Amortization	556		620		592
U S Government
Segment Reporting Information [Line Items]
Revenues	19,263		20,805		22,603
Aerospace
Segment Reporting Information [Line Items]
Revenues	8,118		6,912		5,998
Operating earnings	1,416		858		729
Identifiable Assets	8,005		7,524		7,132
Capital Expenditures	250		204		153
Depreciation and Amortization	123		125		142
Aerospace | U S Government
Segment Reporting Information [Line Items]
Revenues	98		160		171
Combat Systems
Segment Reporting Information [Line Items]
Revenues	6,120		7,992		8,827
Operating earnings	904		663		1,283
Identifiable Assets	9,393		9,619		9,967
Capital Expenditures	54		87		90
Depreciation and Amortization	144		173		173
Combat Systems | U S Government
Segment Reporting Information [Line Items]
Revenues	4,057		5,699		6,343
Marine Systems
Segment Reporting Information [Line Items]
Revenues	6,712		6,592		6,631
Operating earnings	666		750		691
Identifiable Assets	3,088		3,032		2,858
Capital Expenditures	83		85		116
Depreciation and Amortization	103		95		74
Marine Systems | U S Government
Segment Reporting Information [Line Items]
Revenues	6,536		6,504		6,582
Information Systems and Technology
Segment Reporting Information [Line Items]
Revenues	10,268		10,017		11,221
Operating earnings	795		(1,369)		1,200
Identifiable Assets	9,432		9,701		11,934
Capital Expenditures	52		72		93
Depreciation and Amortization	178		220		196
Information Systems and Technology | U S Government
Segment Reporting Information [Line Items]
Revenues	8,572		8,442		9,507
Corporate
Segment Reporting Information [Line Items]
Revenues	0	[1]	0	[1]	0
Operating earnings	(96)	[1]	(69)	[1]	(77)
Identifiable Assets	5,530	[1]	4,433	[1]	2,992
Capital Expenditures	1	[1]	2	[1]	6
Depreciation and Amortization	8	[1]	7	[1]	7	[1]
Corporate | U S Government
Segment Reporting Information [Line Items]
Revenues	$ 0	[1]	$ 0	[1]	$ 0	[1]

[1] Corporate operating results primarily consist of stock option expense. Corporate identifiable assets are primarily cash and equivalents.