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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]  
Minimum rentals on operating leases [Table Text Block]
Minimum non-cancelable operating lease commitments at December 31, 2015 were as follows (in millions):
 
2016
 
2017
 
2018
 
2019
 
2020
 
Thereafter
Minimum rentals on operating leases
$
19

 
$
16

 
$
10

 
$
6

 
$
5

 
$
7