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Segment Information (Tables)
 6 Months Ended
Jul. 01, 2018
Segment Reporting [Abstract]  
Summary Of Financial Information For Each Of Our Segments
The following is additional summary financial information for each of our segments:
 
Capital Expenditures
Depreciation and Amortization
Six Months Ended
July 1, 2018
July 2, 2017
July 1, 2018
July 2, 2017
Aerospace
$
102

$
50

$
72

$
77

Combat Systems
26

31

42

42

Information Technology
21

4

120

15

Mission Systems
26

25

33

29

Marine Systems
81

37

55

51

Corporate
23

6

5

6

Total
$
279

$
153

$
327

$
220

Identifiable assets for each of our segments follows:
 
July 1, 2018
 
December 31, 2017
Aerospace
$
10,990

 
$
10,126

Combat Systems
10,110

 
9,846

Information Technology
14,918

 
3,021

Mission Systems
6,079

 
5,856

Marine Systems
2,917

 
2,906

Corporate*
2,138

 
3,291

Total
$
47,152

 
$
35,046

* Corporate identifiable assets are primarily cash and equivalents.
Summary financial information for each of our segments follows:
 
Revenue
Operating Earnings
Revenue from
U.S. Government
Three Months Ended
July 1, 2018
July 2, 2017
July 1, 2018
July 2, 2017
July 1, 2018
July 2, 2017
Aerospace
$
1,895

$
2,078

$
386

$
421

$
108

$
41

Combat Systems
1,534

1,414

236

225

746

744

Information Technology
2,442

1,052

156

87

2,370

981

Mission Systems
1,147

1,052

153

153

908

840

Marine Systems
2,168

2,079

195

178

2,072

2,056

Corporate
—

—

(38
)
3

—

—

Total
$
9,186

$
7,675

$
1,088

$
1,067

$
6,204

$
4,662

Six Months Ended
 
 
 
 
 
 
Aerospace
$
3,720

$
4,152

$
732

$
860

$
165

$
90

Combat Systems
2,974

2,701

460

430

1,423

1,463

Information Technology
3,580

2,110

257

177

3,448

1,974

Mission Systems
2,245

2,140

299

299

1,775

1,699

Marine Systems
4,202

4,013

379

339

4,051

3,951

Corporate
—

—

(31
)
8

—

—

Total
$
16,721

$
15,116

$
2,096

$
2,113

$
10,862

$
9,177