Inventories
 9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories:
 
Inventories consist of the following (in millions):
 
September 30,
2017
 
December 31,
2016
Finished goods
$
260.3

 
$
206.1

Raw materials and supplies
75.7

 
74.5

Total inventories
$
336.0

 
$
280.6