Net Sales By Customer (Detail) - USD ($) $ in Millions		3 Months Ended									12 Months Ended
		Dec. 31, 2015	[1]	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total net sales		$ 12,917		$ 11,461	$ 11,643	$ 10,111	$ 12,530	$ 11,114	$ 11,306	$ 10,650	$ 46,132	$ 45,600	$ 45,358
U.S. Government
Segment Reporting Information [Line Items]
Total net sales											36,141	36,090	37,173
U.S. Government | Aeronautics
Segment Reporting Information [Line Items]
Total net sales											11,195	10,704	11,025
U.S. Government | Information Systems & Global Solutions
Segment Reporting Information [Line Items]
Total net sales											4,990	5,204	5,823
U.S. Government | Missiles and Fire Control
Segment Reporting Information [Line Items]
Total net sales											4,150	4,509	4,069
U.S. Government | Mission Systems and Training
Segment Reporting Information [Line Items]
Total net sales											6,961	6,752	7,132
U.S. Government | Space Systems
Segment Reporting Information [Line Items]
Total net sales											8,845	8,921	9,124
International
Segment Reporting Information [Line Items]
Total net sales	[2]										9,531	9,015	7,768
International | Aeronautics
Segment Reporting Information [Line Items]
Total net sales	[2]										4,328	4,183	3,078
International | Information Systems & Global Solutions
Segment Reporting Information [Line Items]
Total net sales	[2]										520	401	262
International | Missiles and Fire Control
Segment Reporting Information [Line Items]
Total net sales	[2]										2,449	2,421	2,535
International | Mission Systems and Training
Segment Reporting Information [Line Items]
Total net sales	[2]										2,016	1,921	1,792
International | Space Systems
Segment Reporting Information [Line Items]
Total net sales	[2]										218	89	101
United States Commercial and Other
Segment Reporting Information [Line Items]
Total net sales											460	495	417
United States Commercial and Other | Aeronautics
Segment Reporting Information [Line Items]
Total net sales											47	33	20
United States Commercial and Other | Information Systems & Global Solutions
Segment Reporting Information [Line Items]
Total net sales											86	49	30
United States Commercial and Other | Missiles and Fire Control
Segment Reporting Information [Line Items]
Total net sales											171	162	191
United States Commercial and Other | Mission Systems and Training
Segment Reporting Information [Line Items]
Total net sales											114	59	113
United States Commercial and Other | Space Systems
Segment Reporting Information [Line Items]
Total net sales											$ 42	$ 192	$ 63

[1] The fourth quarter of 2015 incorporates the results of Sikorsky from the November 6, 2015 acquisition date through December 31, 2015, including approximately $400 million in net sales and about $45 million in operating loss, inclusive of intangible amortization and adjustments required to account for the acquisition.

[2] International sales include foreign military sales contracted through the U.S. Government, direct commercial sales with international governments and commercial and other sales to international customers.