Stock Based Compensation Plans (Restricted Stock and Phantom Stock Units) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2015
Oct. 31, 2014
Restricted shares activity        
Unvested, beginning of period 4,157,000 3,988,000    
Granted shares   1,546,000    
Vested shares   (1,197,000)    
Forfeited shares   (180,000)    
Unvested, end of period   4,157,000 3,988,000  
Unvested weighted-average grant date fair value, beginning of period ($ per share) $ 35.43 $ 34.43    
Granted weighted-average grant date fair value ($ per share)   35.23    
Vested weighted-average grant date fair value ($ per share)   31.87    
Forfeited weighted-average grant date fair value ($ per share)   35.14    
Unvested weighted-average grant date fair value, end of period ($ per share)   $ 35.43 $ 34.43  
Fair value of restricted stock that vested during the period   $ 38.1 $ 33.3 $ 35.9
Restricted shares granted in November 2016 1,500,000      
Grant date fair value of November 2016 restricted stock grants $ 34.84      
Compensation cost related to restricted shares granted under the Company's Omnibus Incentive Plans, not yet recognized   $ 89.0    
Weighted-average period over which compensation cost related to restricted shares is expected to be recognized (in years)   2 years 8 months    
Phantom stock units activity        
Phantom stock units issued during the period (as shown)   7,965    
Compensation cost related to phantom stock units issued under the Company's 2013 Plan, not yet recognized   $ 0.1    
Weighted-average period over which compensation cost related to phantom stock units issued is expected to be recognized (in years)   1 year    
Total phantom stock liability paid out   $ 0.3 $ 0.3 $ 0.5