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Interest and Other Expenses (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Other Nonoperating Income (Expense) [Abstract]        
Interest expense $ 8.2 $ 9.3 $ 16.2 $ 17.9
Interest income (0.7) (1.1) (1.2) (2.0)
Foreign exchange (gain) loss 0.0 (0.9) 0.7 (2.1)
Miscellaneous (income) expense, net (0.3) 0.6 2.1 3.3
Interest and other expenses $ 7.2 $ 7.9 $ 17.8 $ 17.1