Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 25, 2010	Jul. 01, 2011	Jun. 25, 2010	Dec. 31, 2010
Segment Information (Textuals)
Number of segments		4
Sales reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments	$ 27		$ 63
Sales reclassified from C3ISR Segment to Government Services segment as a result of business unit re-alignments	20		38
Operating income reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments			6
Operating income reclassified from C3ISR segment to Government Services segment as a result of business unit re-alignments	1		2
Assets reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments				129
Assets reclassified from C3ISR segment to Government Services segment as a result of business unit re-alignments				$ 13

Assets reclassified from C3ISR segment to Government Services segment as a result of business unit re-alignments.

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Assets reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments.

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Number of segments.

Operating income reclassified from C3ISR segment to Government Services segment as a result of business unit re-alignments.

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Operating income reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments.

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Sales reclassified from C3ISR segment to Government Services segment as a result of business unit re-alignments.

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Sales reclassified from Government Services segment to Electronic Systems segment as a result of business unit re-alignments.

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Segment Information Textuals Abstract.

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