Post Retirement Benefit Plans - Reconciliation of Beginning and Ending Balances of Fair Value Measurements Using Significant Unobservable Inputs (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at beginning of year	$ 624.7	$ 650.8
Actual return on plan assets held at reporting date:
Plan participant contributions	0.2	0.2
Currency impact	(47.1)	(27.3)
Balance at end of year	626.3	624.7
Level 3
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward]
Balance at beginning of year	130.2	151.1
Actual return on plan assets held at reporting date:
Assets still held at reporting date	10.6	7.1
Plan participant contributions	0.0	0.0
Net purchases (settlements)	(6.1)	0.0
Transfers	0.0	(3.4)
Currency impact	(9.3)	(24.6)
Balance at end of year	$ 125.4	$ 130.2