Environmental (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Environmental remediation costs	$ 13.2	$ 46.1	$ 14.0
Accrued environmental liability	87.8	88.9
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 73.6	$ 72.6