Post Retirement Benefit Plans - Change in Projected Benefit Obligation (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Change in benefit obligation:
Benefit obligation at beginning of year	$ 1,158.7	$ 662.4
Service cost	12.8	14.1	$ 12.3
Interest cost	25.9	31.0	18.9
Plan participant contributions	0.2	0.2
Expenses paid from assets	(3.4)	(5.9)
Actuarial loss	17.4	131.0
Foreign currency effect	8.6	(1.8)
Benefits paid	(109.9)	(61.6)
Acquisitions		389.3
Benefit obligation at end of year	1,110.3	1,158.7	662.4
United States
Change in benefit obligation:
Benefit obligation at beginning of year	831.0	351.9
Service cost	11.5	12.7	10.8
Interest cost	22.4	25.4	13.2
Plan participant contributions	0.0	0.0
Expenses paid from assets	(2.6)	(5.1)
Actuarial loss	14.6	105.5
Foreign currency effect	0.0	0.0
Benefits paid	(94.9)	(48.7)
Acquisitions		389.3
Benefit obligation at end of year	782.0	831.0	351.9
Germany
Change in benefit obligation:
Benefit obligation at beginning of year	44.1	38.1
Service cost	0.4	0.3	0.4
Interest cost	0.2	0.5	0.5
Plan participant contributions	0.0	0.0
Expenses paid from assets	0.0	0.0
Actuarial loss	(3.5)	7.4
Foreign currency effect	2.3	(0.9)
Benefits paid	(1.4)	(1.3)
Acquisitions		0.0
Benefit obligation at end of year	42.1	44.1	38.1
United Kingdom
Change in benefit obligation:
Benefit obligation at beginning of year	180.8	176.3
Service cost	0.5	0.5	0.5
Interest cost	2.7	3.9	4.0
Plan participant contributions	0.0	0.0
Expenses paid from assets	(0.9)	(0.7)
Actuarial loss	7.6	6.0
Foreign currency effect	1.7	1.1
Benefits paid	(7.8)	(6.3)
Acquisitions		0.0
Benefit obligation at end of year	184.6	180.8	176.3
Netherlands
Change in benefit obligation:
Benefit obligation at beginning of year	91.3	85.4
Service cost	0.3	0.5	0.5
Interest cost	0.3	0.9	0.9
Plan participant contributions	0.2	0.2
Expenses paid from assets	0.2	0.0
Actuarial loss	(1.6)	11.0
Foreign currency effect	5.0	(1.9)
Benefits paid	(4.8)	(4.8)
Acquisitions		0.0
Benefit obligation at end of year	90.9	91.3	85.4
Other International
Change in benefit obligation:
Benefit obligation at beginning of year	11.5	10.7
Service cost	0.1	0.1	0.1
Interest cost	0.3	0.3	0.3
Plan participant contributions	0.0	0.0
Expenses paid from assets	(0.1)	(0.1)
Actuarial loss	0.3	1.1
Foreign currency effect	(0.4)	(0.1)
Benefits paid	(1.0)	(0.5)
Acquisitions		0.0
Benefit obligation at end of year	$ 10.7	$ 11.5	$ 10.7