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Post Retirement Benefit Plans - Schedule of Plan's Change in Benefit Obligation (Detail) - USD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Benefit obligation at beginning of year $ 786.9 $ 703.8  
Service cost (15.5) (15.7) $ (16.7)
Interest cost 27.6 29.6 27.6
Actuarial loss (15.7) (92.8)  
Foreign currency effect 33.7 14.6  
Benefits paid (33.0) (37.7)  
Benefit obligation at end of year 765.8 786.9 703.8
Other Postretirement Benefit Plans, Defined Benefit [Member]      
Pension Plans, Postretirement and Other Employee Benefits [Line Items]      
Benefit obligation at beginning of year 17.3 18.5  
Service cost 0.0 0.0 0.0
Interest cost 0.7 0.8 0.8
Actuarial loss (1.0) (0.5)  
Foreign currency effect (0.6) (0.3)  
Benefits paid (1.5) (1.2)  
Benefit obligation at end of year $ 14.9 $ 17.3 $ 18.5