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Net Income Per Common Share - Anti-Dilutive Outstanding Stock Awards Issued Under Share-Based Compensation Plans (Details) - shares
shares in Millions
12 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2015
Earnings Per Share [Abstract]      
Anti-dilutive (in shares) 0.0 0.1 0.2