Business Segments (Tables)

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

The segment information for the periods presented, of which the prior period has been recast to reflect the Company's current reportable segment structure, was as follows:

	Three Months Ended
	March 31, 2017			April 1, 2016
	(in millions)
Revenues:
Defense Solutions	$	1,294		$	780
Civil	842			361
Health	443			171
Corporate	1			—
Total revenues	$	2,580		$	1,312
Operating income (loss):
Defense Solutions	$	79		$	71
Civil	54			22
Health	47			16
Corporate	(39		)	(20		)
Total operating income	$	141		$	89