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Inventories (Tables)
 6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Summary of Inventories
Inventories consist of the following (in millions):
 
June 30, 2020
 
December 31, 2019
 
Titled
Inventory
 
Supply and Offtake
Agreements (1)
 
Total
 
Titled
Inventory
 
Supply and Offtake
Agreements (1)
 
Total
Raw materials
$
32.1

 
$
9.5

 
$
41.6

 
$
48.3

 
$
11.6

 
$
59.9

Work in process
26.1

 
26.1

 
52.2

 
35.0

 
29.1

 
64.1

Finished goods
109.0

 
37.6

 
146.6

 
124.8

 
43.8

 
168.6

 
$
167.2

 
$
73.2

 
$
240.4

 
$
208.1

 
$
84.5

 
$
292.6

 
(1) 
Amounts represent LIFO value and do not necessarily represent the value of product financing. Please read Note 7 - “Inventory Financing Agreements” for further information.