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Income Taxes - The Components of Income before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Nov. 30, 2016
Income Tax Disclosure [Abstract]      
U.S. $ (2.0) $ (9.1) $ 1.5
Foreign 16.5 5.0 8.4
Income (loss) before income taxes $ 14.5 $ (4.1) $ 9.9