Goodwill and Identifiable Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jul. 01, 2011		Jun. 25, 2010	Jul. 01, 2011		Jun. 25, 2010	Dec. 31, 2010
Goodwill
Balance at December 31, 2010				$ 8,730
Business acquisitions				13
Foreign currency translation adjustments				52
Balance at July 1, 2011	8,795	[1]		8,795	[1]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)				21
Gross Carrying Amount	763			763			757
Accumulated Amortization	318			318			287
Net Carrying Amount	445			445			470
Amortization expense
Amortization expense	15		14	30		27
Estimated amortization expense
Estimated amortization expense, 2011				62
Estimated amortization expense, 2012				54
Estimated amortization expense, 2013				44
Estimated amortization expense, 2014				44
Estimated amortization expense, 2015				39
C3ISR [Member]
Goodwill
Balance at December 31, 2010				868
Business acquisitions				2
Foreign currency translation adjustments				3
Segment reclassification				(5)
Balance at July 1, 2011	868			868
Government Services [Member]
Goodwill
Balance at December 31, 2010				2,285
Foreign currency translation adjustments				1
Segment reclassification				(94)
Balance at July 1, 2011	2,192			2,192
AM&M [Member]
Goodwill
Balance at December 31, 2010				1,172
Business acquisitions				2
Foreign currency translation adjustments				10
Balance at July 1, 2011	1,184			1,184
Electronic Systems [Member]
Goodwill
Balance at December 31, 2010				4,405
Business acquisitions				9
Foreign currency translation adjustments				38
Segment reclassification				99
Balance at July 1, 2011	4,551			4,551
Customer contractual relationships [Member]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)				23
Gross Carrying Amount	587			587			584
Accumulated Amortization	227			227			205
Net Carrying Amount	360			360			379
Technology [Member]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)				11
Gross Carrying Amount	147			147			145
Accumulated Amortization	79			79			72
Net Carrying Amount	68			68			73
Other [Member]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)				15
Gross Carrying Amount	29			29			28
Accumulated Amortization	12			12			10
Net Carrying Amount	$ 17			$ 17			$ 18

[1] Unaudited