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Business Segment Information (Tables)
 6 Months Ended
Jul. 03, 2015
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 3,
2015

August 1,
2014
 
July 3,
2015
 
August 1,
2014
 
(in millions)
Revenues:

 

 
 
 
 
National Security Solutions
$
879

 
$
925

 
$
1,741

 
$
1,869

Health and Engineering
379

 
381

 
764

 
753

Corporate and Other
(1
)
 
—

 
(2
)
 
(4
)
Total revenues
$
1,257

 
$
1,306

 
$
2,503

 
$
2,618

 
 
 
 
 
 
 
 
Operating income (loss):
 
 
 
 
 
 
 
National Security Solutions
$
74

 
$
78

 
$
136

 
$
155

Health and Engineering
(7
)
 
(482
)
 
(14
)
 
(459
)
Corporate and Other
(3
)
 
(6
)
 
(20
)
 
(19
)
Total operating income (loss)
$
64

 
$
(410
)
 
$
102

 
$
(323
)