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UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Foreign currency translation adjustments, tax expense (benefit) $ 0.0 $ 1.0
Amortization of pension related costs, tax expense (benefit) 0.3 0.4
Pension curtailment gain, tax expense (benefit)   0.3
Reclassification into earnings of accumulated losses from the de-designated 2013 Interest Rate Swap, tax expense (benefit) $ 0.2 $ 0.4