Acquisitions, Intangible Assets And Goodwill (Schedule Of Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Apr. 01, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,246		$ 3,219
Accumulated Amortization	(1,463)		(1,406)
Net Carrying Amount	1,783		1,813
Contract And Program Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,401	[1]	2,393	[1]
Accumulated Amortization	(1,105)	[1]	(1,060)	[1]
Net Carrying Amount	1,296	[1]	1,333	[1]
Trade Names And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	495		477
Accumulated Amortization	(77)		(70)
Net Carrying Amount	418		407
Technology And Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	176		175
Accumulated Amortization	(115)		(110)
Net Carrying Amount	61		65
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	174		174
Accumulated Amortization	(166)		(166)
Net Carrying Amount	$ 8		$ 8

[1] Consists of acquired backlog and probable follow-on work and related customer relationships.