Environmental (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Loss Contingencies [Line Items]
Environmental remediation costs	$ 1.1	$ 1.7	$ 1.9	$ 16.9
Accrued environmental liability	82.7		82.7		88.9
Other Long Term Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 65.0		$ 65.0		$ 72.6