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Inventories, net (Tables)
 6 Months Ended
Jun. 30, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories, net are comprised of:
In millions
June 30, 2016
 
December 31, 2015
Raw materials
$
45.4

 
$
41.0

Production materials, stores and supplies
11.7

 
11.3

Finished and in-process goods
121.8

 
118.6

Inventories valued at current costs
178.9

 
170.9

Less: excess of cost over LIFO cost
(22.1
)
 
(19.9
)
Inventories, net
$
156.8

 
$
151.0