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Inventories, net
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Inventories, net
Inventories, net

Certain U.S. inventories are measured by the last-in, first-out (“LIFO”) method at the lower of cost or market, while other U.S. and foreign operations use the first-in, first-out (“FIFO”) or average-cost methods at the lower of cost and net realizable value. Inventories consisted of the following:
 
September 30,
 
December 31,
(in millions)
2018
 
2017
Raw material and supplies
$
512.1

 
$
469.7

Work in progress
122.6

 
126.7

Finished goods
190.7

 
183.0

FIFO inventories
825.4

 
779.4

LIFO reserve
(15.1
)
 
(13.1
)
Inventories, net
$
810.3

 
$
766.3