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Income Taxes - Schedule of Loss from Continuing Operations before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Income (Loss) from Continuing Operations before Income Taxes [Abstract]    
U.S. $ (29.4) $ (34.9)
International 0.7 (4.8)
Loss from continuing operations before income taxes $ (28.7) $ (39.7)