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Inventories, Net
 3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories, Net Inventories, Net
 
Inventories, net, consist of the following (amounts in millions):
 
 
At March 31, 2019
 
At December 31, 2018
Finished goods
$
44

 
$
40

Purchased parts and components
1

 
3

Inventories, net
$
45

 
$
43


 
At March 31, 2019 and December 31, 2018, inventory reserves were $20 million and $22 million, respectively.