Inventories
 3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories:
 
Inventories consist of the following (in millions):
 
March 31,
2017
 
December 31,
2016
Finished goods
$
162.9

 
$
206.1

Raw materials and supplies
74.8

 
74.5

Total inventories
$
237.7

 
$
280.6