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Commitments and Contingencies (Minimum Operating Lease Payments) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]  
Operating Leases, Future Minimum Payments Due, Next Twelve Months $ 6.3
Operating Leases, Future Minimum Payments, Due in Two Years 5.9
Operating Leases, Future Minimum Payments, Due in Three Years 5.0
Operating Leases, Future Minimum Payments, Due in Four Years 4.0
Operating Leases, Future Minimum Payments, Due in Five Years 2.3
Operating Leases, Future Minimum Payments, Due Thereafter 57.1
Operating Leases, Future Minimum Payments Due $ 80.6