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Interest and Other Expenses (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Interest and Other Expenses [Abstract]      
Interest expense $ 42.8 $ 43.7 $ 61.7
Interest income (7.3) (6.2) (11.7)
Foreign exchange (gains) / losses 2.8 3.3 0.8
Miscellaneous expenses, net 6.0 2.4 3.5
Loss from sale of an equity investment 0 0 10.3
Interest and other expense 44.3 43.2 64.6
Interest expense associated with repayments of amounts outstanding under revolving credit agreement and termination on interest rate swap agreements 0 0 7.5
Cash proceeds from sale of an equity investment in Japan $ 0 $ 0 $ 13.3