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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Payments Under Operating Leases [Table Text Block]
Lease commitments — Cash obligations under future minimum rental commitments under operating leases and net rental expense are shown in the table below. Operating lease commitments are primarily related to facilities.
 
2016
 
2017
 
2018
 
2019
 
2020
 
Thereafter
 
Total
Lease commitments
$
34

 
$
32

 
$
24

 
$
15

 
$
13

 
$
41

 
$
159
Rent Expense [Table Text Block]
 
2015
 
2014
 
2013
Rent expense
$49
 
$51
 
$58