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INVENTORIES
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
INVENTORIES
NOTE 9. INVENTORIES
 
December 31,
 
2018
 
2017
 
($ in millions)
Supplies
$
66.4

 
$
66.1

Raw materials
66.7

 
75.3

Work in process
139.6

 
127.8

Finished goods
488.5

 
462.6

 
761.2

 
731.8

LIFO reserve
(49.8
)
 
(49.2
)
Inventories, net
$
711.4

 
$
682.6



Inventories valued using the LIFO method comprised 55% of the total inventories at both December 31, 2018 and 2017.  The replacement cost of our inventories would have been approximately $49.8 million and $49.2 million higher than that reported at December 31, 2018 and 2017, respectively.