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Segment Information (Tables)
 9 Months Ended
Sep. 30, 2017
Segment Reporting [Abstract]  
Net Sales and Operating Earnings by Segment
The following table summarizes Net sales by segment: 
 
Three Months Ended
 
Nine Months Ended
  
September 30,
2017
 
October 1,
2016
 
September 30,
2017
 
October 1,
2016
Products
$
989

 
$
920

 
$
2,540

 
$
2,423

Services
656

 
612

 
1,883

 
1,732

 
$
1,645

 
$
1,532

 
$
4,423

 
$
4,155

The following table summarizes the Operating earnings by segment: 
 
Three Months Ended
 
Nine Months Ended
  
September 30,
2017
 
October 1,
2016
 
September 30,
2017
 
October 1,
2016
Products
$
253

 
$
225

 
$
510

 
$
404

Services
85

 
116

 
260

 
260

Operating earnings
338

 
341

 
770

 
664

Total other expense
(52
)
 
(48
)
 
(160
)
 
(182
)
Earnings before income taxes
$
286

 
$
293

 
$
610

 
$
482