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UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Statement [Abstract]        
Currency translation adjustment, tax expense (benefit) $ 0.7 $ (3.5) $ 1.3 $ (6.3)
Amortization of pension related costs, tax expense (benefit) 0.4 0.3 1.1 1.0
Revaluation of derivative financial instrument, tax expense (benefit) $ 0.5 $ (0.5) $ 0.1 $ (1.7)