Goodwill and Identifiable Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2011		Sep. 24, 2010	Sep. 24, 2010	Sep. 30, 2011 Year Employee Segment		Dec. 31, 2010
Goodwill
Balance at December 31, 2010					$ 8,730
Business acquisitions					17
Foreign currency translation adjustments					(12)
Balance at September 30, 2011	8,735	[1]			8,735	[1]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)					21
Gross Carrying Amount	761				761		757
Accumulated Amortization	333				333		287
Net Carrying Amount	428				428		470
Amortization expense
Amortization expense	15		18	45	45
Estimated amortization expense
Estimated amortization expense, 2011					61
Estimated amortization expense, 2012					54
Estimated amortization expense, 2013					43
Estimated amortization expense, 2014					44
Estimated amortization expense, 2015					39
C3ISR [Member]
Goodwill
Balance at December 31, 2010					868
Business acquisitions					3
Foreign currency translation adjustments					1
Segment reclassification					(5)
Balance at September 30, 2011	867				867
Government Services [Member]
Goodwill
Balance at December 31, 2010					2,285
Segment reclassification					(94)
Balance at September 30, 2011	2,191				2,191
AM&M [Member]
Goodwill
Balance at December 31, 2010					1,172
Business acquisitions					2
Foreign currency translation adjustments					(8)
Balance at September 30, 2011	1,166				1,166
Electronic Systems [Member]
Goodwill
Balance at December 31, 2010					4,405
Business acquisitions					12
Foreign currency translation adjustments					(5)
Segment reclassification					99
Balance at September 30, 2011	4,511				4,511
Customer contractual relationships [Member]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)					23
Gross Carrying Amount	585				585		584
Accumulated Amortization	237				237		205
Net Carrying Amount	348				348		379
Technology [Member]
Identifiable Intangible Assets
Weighted Average Amortization Period (in years)					11
Gross Carrying Amount	147				147		145
Accumulated Amortization	84				84		72
Net Carrying Amount	63				63		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