Business Segments (Tables)

6 Months Ended

Jul. 01, 2016

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

The segment information for the periods presented was as follows:

	Three Months Ended						Six Months Ended
	July 1, 2016			July 3, 2015			July 1, 2016			July 3, 2015
	(in millions)
Revenues:
National Security Solutions	$	915		$	879		$	1,813		$	1,741
Health and Infrastructure Sector	373			379			787			764
Corporate and Other	—			(1		)	—			(2		)
Total revenues	$	1,288		$	1,257		$	2,600		$	2,503
Operating income (loss):
National Security Solutions	$	61		$	74		$	133		$	136
Operating income margin	6.7		%	8.4		%	7.3		%	7.8		%
Health and Infrastructure Sector	39			(7		)	75			(14		)
Operating income (negative) margin	10.5		%	(1.8		)%	9.5		%	(1.8		)%
Corporate and Other	(25		)	(3		)	(44		)	(20		)
Total operating income	$	75		$	64		$	164		$	102
Operating income margin	5.8		%	5.1		%	6.3		%	4.1		%