Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 29, 2012	Jul. 01, 2011	Dec. 31, 2011
Basis of Presentation (Textual)
Percentage of sales accounted for under contract accounting standards			40.00%
Percentage of fixed-price type contracts			30.00%
Percentage of cost-plus type contracts			10.00%
Period of performance for contracts accounted for under the percentage-of-completion method of accounting, minimum	1 year
Increase in consolidated operating income due to changes in contract estimates	$ 60	$ 39
Percentage of increase in consolidated operating income due to changes in contract estimates	8.30%	4.90%
Embedded derivative related to the CODES [Member]
Basis of Presentation (Textual)
Interest rate on debt instruments	3.00%