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Share-Based Compensation Plans - Performance Share Narrative (Details) - Stock options - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost $ 10.0    
Weighted-average vesting period 1 year 4 months    
Service period 3 years    
Fair value per share of awards granted (usd per share) $ 29.8 $ 27.7 $ 20.5
Total fair value of RSUs vested $ 5.0 $ 5.0 $ 2.2
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards originally granted 0.00%    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards originally granted 150.00%