The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

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+ Details

Employee Severance and Termination Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 30, 2012	Apr. 01, 2011	Dec. 31, 2011
Employee severance and other termination costs incurred by reportable segment
Employee severance and other related termination costs	$ 8	$ 2	$ 24
C3ISR [Member]
Employee severance and other termination costs incurred by reportable segment
Employee severance and other related termination costs
Government Services [Member]
Employee severance and other termination costs incurred by reportable segment
Employee severance and other related termination costs	1
AM&M [Member]
Employee severance and other termination costs incurred by reportable segment
Employee severance and other related termination costs	3
Electronic Systems [Member]
Employee severance and other termination costs incurred by reportable segment
Employee severance and other related termination costs	$ 4	$ 2