Segment Reporting Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 29, 2014		Jun. 30, 2013		Jun. 29, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 7,474		$ 7,834		$ 14,739		$ 15,148
Operating Earnings	949		961		1,823		1,804
Aerospace
Segment Reporting Information [Line Items]
Revenues	1,995		2,053		4,120		3,831
Operating Earnings	384		389		788		699
Combat Systems
Segment Reporting Information [Line Items]
Revenues	1,465		1,472		2,723		2,935
Operating Earnings	220		219		359		430
Marine Systems
Segment Reporting Information [Line Items]
Revenues	1,851		1,759		3,452		3,385
Operating Earnings	174		178		340		337
Information Systems and Technology
Segment Reporting Information [Line Items]
Revenues	2,163		2,550		4,444		4,997
Operating Earnings	188		198		371		383
Corporate
Segment Reporting Information [Line Items]
Revenues	0	[1]	0	[1]	0	[1]	0	[1]
Operating Earnings	$ (17)	[1]	$ (23)	[1]	$ (35)	[1]	$ (45)	[1]

[1] *Corporate operating results consist primarily of stock option expense.