Property, Plant and Equipment (Tables)

9 Months Ended

Sep. 30, 2015

Property, Plant and Equipment [Abstract]

Summary of costs for property, plant, and equipment

A summary of costs for property, plant and equipment is as follows:

	September 30, 2015		December 31, 2014
	(in millions)
Land and improvements	$	38.1	$	37.4
Buildings	52.3		50.4
Machinery and equipment	2,638.6		2,581.2
Automotive equipment	23.3		22.1
Furniture and fixtures	20.7		19.0
Leasehold improvements	3.4		3.4
Aircraft	3.6		3.7
Railcars	14.9		14.5
Construction in progress	156.8		71.5
	2,951.7		2,803.2
Accumulated depreciation	1,003.0		887.2
Total property, plant and equipment, net	$	1,948.7	$	1,916.0