Property, Plant, and Equipment Property, Plant, and Equipment (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
Capitalized interest	$ 2.9	$ 0.4	$ 5.2	$ 1.2
Original carrying value of assets under capital lease obligations	$ 24.8		$ 24.8		$ 24.8