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Inventories, Net (Tables)
 3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of inventories
Our inventories, net consist of the following (amounts in millions):
 
 
At March 31, 2017
 
At December 31, 2016
Finished goods
$
44

 
$
40

Purchased parts and components
4

 
9

Inventories, net
$
48

 
$
49