Segment Reporting Information (Detail) - USD ($) $ in Millions		3 Months Ended
		Apr. 03, 2016	Apr. 05, 2015
Segment Reporting Information [Line Items]
Revenue		$ 7,724	$ 7,784
Operating Earnings		1,053	1,027
Aerospace
Segment Reporting Information [Line Items]
Revenue		1,987	2,108
Operating Earnings		411	431
Combat Systems
Segment Reporting Information [Line Items]
Revenue		1,273	1,363
Operating Earnings		217	204
Information Systems and Technology
Segment Reporting Information [Line Items]
Revenue		2,333	2,370
Operating Earnings		248	217
Marine Systems
Segment Reporting Information [Line Items]
Revenue		2,131	1,943
Operating Earnings		192	188
Corporate
Segment Reporting Information [Line Items]
Revenue	[1]	0	0
Operating Earnings	[1]	$ (15)	$ (13)

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