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Interest and Other Expenses (Tables)
12 Months Ended
Dec. 31, 2011
Interest and Other Expenses [Abstract]  
Interest and other expenses
Interest and other expenses consisted of the following:
 
Year Ended December 31  2011   2010   2009  
Interest expense $ 42.8  $ 43.7  $ 61.7  
Interest income  (7.3)  (6.2)  (11.7)
Foreign exchange losses  2.8   3.3   0.8  
Miscellaneous expenses, net  6.0   2.4   3.5  
Loss from sale of an equity investment      10.3  
Interest and other expenses $ 44.3  $ 43.2  $ 64.6