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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of Comprehensive Income [Abstract]      
Unrealized loss from change in pension costs, tax $ 0.5 $ 0.1 $ 0.0
Unrealized gain (loss) on cash flow hedges, tax $ (0.1) $ (0.2) $ 0.8