Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Environmental [Abstract]
Accrual for Environmental Loss Contingencies	$ 13.0	$ 13.6
OperatingLeasesFutureMinimumPaymentsDue[Abstract]
Due in 1 Year	13.2
Due in 2 Years	11.9
Due in 3 Years	10.2
Due in 4 Years	6.9
Due in 5 Years	3.9
Due Thereafter	16.4
OperatingLeasesRentExpense[Abstract]
OperatingLeasesRentExpenseNet	$ 21.7	$ 22.3	$ 22.2

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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-Name Accounting Standards Codification

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-Name Statement of Position (SOP)

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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