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Interest and Other Expenses (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Other Nonoperating Income (Expense) [Abstract]        
Interest expense $ 9.2 $ 9.6 $ 25.4 $ 27.5
Interest income (0.7) (1.4) (1.9) (3.4)
Foreign exchange (gain) loss (0.2) 0.7 0.5 (1.4)
Miscellaneous expenses, net 1.1 1.0 3.2 4.3
Interest and other expenses $ 9.4 $ 9.9 $ 27.2 $ 27.0