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UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Statement [Abstract]    
Foreign currency translation adjustments, tax expense (benefit) $ 1.0 $ 0.1
Amortization of pension related costs, tax expense (benefit) 0.4 0.3
Pension curtailment gain, tax 0.3  
Revaluation of derivative financial instruments, net of reclassifications into earnings, tax expense (benefit) $ (0.4) $ (0.5)