Segment Reporting Information (Detail) - USD ($) $ in Millions		3 Months Ended
		Apr. 02, 2017	Apr. 03, 2016
Segment Reporting Information [Line Items]
Revenues		$ 7,441	$ 7,476
Operating earnings		1,035	924
Aerospace
Segment Reporting Information [Line Items]
Revenues		2,074	1,781
Operating earnings		443	332
Combat Systems
Segment Reporting Information [Line Items]
Revenues		1,287	1,245
Operating earnings		205	187
Information Systems and Technology
Segment Reporting Information [Line Items]
Revenues		2,146	2,328
Operating earnings		236	237
Marine Systems
Segment Reporting Information [Line Items]
Revenues		1,934	2,122
Operating earnings		161	184
Corporate
Segment Reporting Information [Line Items]
Revenues	[1]	0	0
Operating earnings	[1]	$ (10)	$ (16)

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