Post Retirement Benefit Plans - Schedule of Plan's Change in Benefit Obligation (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 765.8	$ 786.9
Service cost	(12.4)	(15.5)	$ (15.7)
Interest cost	22.0	27.6	29.6
Actuarial loss	(70.1)	(15.7)
Foreign currency effect	43.4	33.7
Benefits paid	(39.8)	(33.0)
Benefit obligation at end of year	783.8	765.8	786.9
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	14.9	17.3
Service cost	0.0	0.0	0.0
Interest cost	0.5	0.7	0.8
Actuarial loss	(0.6)	(1.0)
Foreign currency effect	(0.1)	(0.6)
Benefits paid	(1.1)	(1.5)
Benefit obligation at end of year	$ 13.6	$ 14.9	$ 17.3