Post Retirement Benefit Plans - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Special Events
Settlement	$ 0.9			$ 25.9
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 14.1	$ 12.3	13.3
Interest cost		31.0	18.9	18.2
Expected return on plan assets		(38.8)	(25.5)	(27.7)
Amortization of prior service (cost) benefit		(0.1)	(0.2)	(0.1)
Recognized net actuarial loss		7.1	11.0	10.9
Other Adjustments			2.8
Special Events
Settlement			1.3	27.8
Net periodic pension (benefit) cost		13.3	20.6	42.4
Loss on sale of business				0.7
Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost		12.7	10.8	11.8
Interest cost		25.4	13.2	12.9
Expected return on plan assets		(30.5)	(16.8)	(15.6)
Amortization of prior service (cost) benefit		(0.1)	(0.1)	0.0
Recognized net actuarial loss		5.0	8.1	8.1
Other Adjustments			0.0
Special Events
Settlement			0.0	25.9
Net periodic pension (benefit) cost		12.5	15.2	43.1
Pension Plan | Germany
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.3	0.4	0.5
Interest cost		0.5	0.5	0.5
Expected return on plan assets		0.0	0.0	0.0
Amortization of prior service (cost) benefit		0.0	0.0	0.0
Recognized net actuarial loss		0.9	1.1	1.3
Other Adjustments			0.0
Special Events
Settlement			0.0	0.7
Net periodic pension (benefit) cost		1.7	2.0	3.0
Pension Plan | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.5	0.5	0.5
Interest cost		3.9	4.0	3.8
Expected return on plan assets		(6.2)	(6.5)	(10.2)
Amortization of prior service (cost) benefit		0.1	0.0	0.0
Recognized net actuarial loss		1.2	1.7	1.5
Other Adjustments			2.8
Special Events
Settlement			1.3	1.2
Net periodic pension (benefit) cost		(0.5)	3.8	(3.2)
Pension Plan | Netherlands
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.5	0.5	0.4
Interest cost		0.9	0.9	0.7
Expected return on plan assets		(1.3)	(1.4)	(1.2)
Amortization of prior service (cost) benefit		(0.1)	(0.1)	(0.1)
Recognized net actuarial loss		0.0	0.0	0.0
Other Adjustments			0.0
Special Events
Settlement			0.0	0.0
Net periodic pension (benefit) cost		0.0	(0.1)	(0.2)
Pension Plan | Other International
Defined Benefit Plan Disclosure [Line Items]
Service cost		0.1	0.1	0.1
Interest cost		0.3	0.3	0.3
Expected return on plan assets		(0.8)	(0.8)	(0.7)
Amortization of prior service (cost) benefit		0.0	0.0	0.0
Recognized net actuarial loss		0.0	0.1	0.0
Other Adjustments			0.0
Special Events
Settlement			0.0	0.0
Net periodic pension (benefit) cost		$ (0.4)	$ (0.3)	$ (0.3)