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Inventories
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventories
(4) Inventories

Inventories consisted of the following:
(in millions)
September 30, 2019
 
December 31, 2018
Raw materials
$
114

 
$
101

In-process inventories
18

 
12

Finished goods
176

 
186

Parts, supplies and other
80

 
81

Total inventories
$
388

 
$
380