Post Retirement Benefit Plans - Amounts Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	$ 149.7	$ 171.0
Unrecognized prior service cost	0.7	(2.9)
Accumulated other comprehensive loss (Pre-tax)	150.4	168.1	$ 199.8
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	10.4	10.3
Accrued benefit liability	(78.0)	(159.5)
Accumulated other comprehensive loss	150.4	168.1	$ 199.8
Net amount recognized	82.8	18.9
United States
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	82.9	94.7
Unrecognized prior service cost	(1.1)	(1.2)
Accumulated other comprehensive loss (Pre-tax)	81.8	93.5
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	0.0	0.0
Accrued benefit liability	(39.9)	(119.0)
Accumulated other comprehensive loss	81.8	93.5
Net amount recognized	41.9	(25.5)
Foreign Plan | Germany
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	13.1	14.9
Unrecognized prior service cost	0.0	0.0
Accumulated other comprehensive loss (Pre-tax)	13.1	14.9
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	0.0	0.0
Accrued benefit liability	(38.1)	(39.9)
Accumulated other comprehensive loss	13.1	14.9
Net amount recognized	(25.0)	(25.0)
Foreign Plan | United Kingdom
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	49.5	57.0
Unrecognized prior service cost	3.5	0.0
Accumulated other comprehensive loss (Pre-tax)	53.0	57.0
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	2.3	1.9
Accrued benefit liability	0.0	0.0
Accumulated other comprehensive loss	53.0	57.0
Net amount recognized	55.3	58.9
Foreign Plan | Netherlands
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	1.5	0.8
Unrecognized prior service cost	(1.7)	(1.7)
Accumulated other comprehensive loss (Pre-tax)	(0.2)	(0.9)
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	5.0	5.7
Accrued benefit liability	0.0	0.0
Accumulated other comprehensive loss	(0.2)	(0.9)
Net amount recognized	4.8	4.8
Foreign Plan | Other International
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Unrecognized net actuarial loss	2.7	3.6
Unrecognized prior service cost	0.0	0.0
Accumulated other comprehensive loss (Pre-tax)	2.7	3.6
Amounts recognized in the Consolidated Balance Sheets consist of:
Prepaid benefit cost	3.1	2.7
Accrued benefit liability	0.0	(0.6)
Accumulated other comprehensive loss	2.7	3.6
Net amount recognized	$ 5.8	$ 5.7