Inventories

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

Inventories are valued at the lower of cost, as determined by the first-in, first-out ("FIFO") method, or net realizable value.  Inventory values using the FIFO method of accounting approximate replacement cost.  Inventories are summarized as follows:

(in millions)	March 31, 2018		December 31, 2017
Raw materials and supplies	$	188.5	$	198.3
Work in process and finished goods	439.6		421.9
Total inventories	$	628.1	$	620.2