Segment Information - Summary of Segment Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012	Dec. 31, 2012
Net Sales:
Net sales	$ 2,996	$ 3,283	$ 9,373	$ 9,586
Operating income	314	331	934	987
Depreciation and amortization	52	54	158	165
Total Assets:
Total assets	14,075		14,075		13,841
Operating Segments [Member] | C3ISR [Member]
Net Sales:
Net sales	754	889	2,533	2,642
Operating income	63	93	224	272
Depreciation and amortization	12	11	33	34
Total Assets:
Total assets	2,051		2,051		2,030
Operating Segments [Member] | Electronic Systems [Member]
Net Sales:
Net sales	1,368	1,432	4,156	4,191
Operating income	173	158	468	480
Depreciation and amortization	34	34	105	105
Total Assets:
Total assets	8,277		8,277		8,077
Operating Segments [Member] | P&LS [Member]
Net Sales:
Net sales	654	715	2,022	2,033
Operating income	52	65	176	179
Depreciation and amortization	4	4	12	15
Total Assets:
Total assets	2,091		2,091		1,997
Operating Segments [Member] | NSS [Member]
Net Sales:
Net sales	323	353	987	1,042
Operating income	26	15	66	56
Depreciation and amortization	2	5	8	11
Total Assets:
Total assets	1,264		1,264		1,228
Corporate [Member]
Total Assets:
Total assets	392		392		509
Elimination of intercompany sales [Member]
Net Sales:
Net sales	$ (103)	$ (106)	$ (325)	$ (322)