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Earnings (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Earnings Per Share [Abstract]    
Net income (loss) $ (4.6) $ 7.3
Denominator for basic earnings (loss) per share - weighted average shares outstanding 44.7 44.6
Effect of dilutive securities 0.0 0.4
Denominator for dilutive earnings (loss) per share - adjusted weighted average shares and assumed conversions 44.7 45.0
Net income (loss) per share - Basic and Diluted $ (0.10) $ 0.16
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0.2 0.1