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Inventories
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Inventories
(4) Inventories

Inventories consisted of the following:
(in millions)
March 31, 2019
 
December 31, 2018
Finished goods
$
184

 
$
186

Raw materials
103

 
105

In-process inventories
36

 
12

Parts, supplies and other
80

 
77

Total inventories
$
403

 
$
380