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Inventories (Tables)
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of components of inventories
Inventories consisted of the following:
(in millions)
June 30, 2019
 
December 31, 2018
Finished goods
$
184

 
$
186

Raw materials
103

 
101

Parts, supplies and other
81

 
81

In-process inventories
22

 
12

Total inventories
$
390

 
$
380