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Inventories, Net (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of inventories
Our inventories, net consist of the following (amounts in millions):
 
 
At June 30, 2017
 
At December 31, 2016
Finished goods
$
42

 
$
40

Purchased parts and components
9

 
9

Inventories, net
$
51

 
$
49