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Business Group Information (Tables)
 3 Months Ended
Apr. 02, 2017
Segment Reporting [Abstract]  
Summary Of Financial Information For Each Of Our Business Groups
Summary financial information for each of our business groups follows:
 
Revenue
Operating Earnings
Three Months Ended
April 2, 2017
April 3, 2016
April 2, 2017
April 3, 2016
Aerospace
$
2,074

$
1,781

$
443

$
332

Combat Systems
1,287

1,245

205

187

Information Systems and Technology
2,146

2,328

236

237

Marine Systems
1,934

2,122

161

184

Corporate*
—

—

(10
)
(16
)
Total
$
7,441

$
7,476

$
1,035

$
924

* Corporate operating results consist primarily of stock option expense.