Other Accrued Liabilities (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Other accrued liabilities
Compensation and other employee benefits	$ 21.8	$ 16.4
Construction in progress accruals	19.7	7.1
Accrued interest payable	5.5	0.1
Restructuring costs	3.8
Accrued taxes	1.5	9.2
Acquisition related accruals		5.8
Other accrued expense	22.0	17.7
Total other accrued liabilities	$ 74.3	$ 56.3