Property, Plant and Equipment, Net

9 Months Ended

Sep. 30, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net:

Property, plant and equipment, net consists of the following (in millions):

	September 30, 2015			December 31, 2014
Land, buildings and structures and leasehold improvements	$	347.3		$	352.2
Machinery and equipment	696.7			669.1
Office furniture and equipment	19.6			17.5
Mineral interests	171.7			179.6
Construction in progress	164.2			108.9
	1,399.5			1,327.3
Less accumulated depreciation and depletion	(636.6		)	(626.4		)
Property, plant and equipment, net	$	762.9		$	700.9