Post Retirement Benefit Plans - Fair Value of the Pension Plans Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Change in plan assets:
Fair value of plan assets at beginning of year	$ 1,017.0
Fair value of plan assets at end of year	1,002.1	$ 1,017.0
Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	1,017.0	594.8
Actual return on plan assets	65.4	140.1
Expenses paid	(3.4)	(5.9)
Plan participant contributions	0.2	0.2
Foreign currency impact	6.4	(0.7)
Employer contributions	22.4	22.7
Benefits paid out of plan	(105.9)	(57.8)
Acquisitions		323.6
Fair value of plan assets at end of year	1,002.1	1,017.0
United States | Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	698.7	311.9
Actual return on plan assets	62.2	93.4
Expenses paid	(2.6)	(5.1)
Plan participant contributions	0.0	0.0
Foreign currency impact	0.0	0.0
Employer contributions	21.0	21.0
Benefits paid out of plan	(92.3)	(46.1)
Acquisitions		323.6
Fair value of plan assets at end of year	687.0	698.7
Germany | Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Expenses paid	0.0	0.0
Plan participant contributions	0.0	0.0
Foreign currency impact	0.0	0.0
Employer contributions	0.0	0.0
Benefits paid out of plan	0.0	0.0
Acquisitions		0.0
Fair value of plan assets at end of year	0.0	0.0
United Kingdom | Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	209.8	178.7
Actual return on plan assets	4.6	35.2
Expenses paid	(0.9)	(0.7)
Plan participant contributions	0.0	0.0
Foreign currency impact	1.9	1.3
Employer contributions	2.4	1.6
Benefits paid out of plan	(7.8)	(6.3)
Acquisitions		0.0
Fair value of plan assets at end of year	210.0	209.8
Netherlands | Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	94.5	90.6
Actual return on plan assets	(2.1)	10.7
Expenses paid	0.2	0.0
Plan participant contributions	0.2	0.2
Foreign currency impact	5.0	(2.1)
Employer contributions	(1.0)	0.0
Benefits paid out of plan	(4.8)	(4.9)
Acquisitions		0.0
Fair value of plan assets at end of year	92.0	94.5
Other International | Pension Plan
Change in plan assets:
Fair value of plan assets at beginning of year	14.0	13.6
Actual return on plan assets	0.7	0.8
Expenses paid	(0.1)	(0.1)
Plan participant contributions	0.0	0.0
Foreign currency impact	(0.5)	0.1
Employer contributions	0.0	0.1
Benefits paid out of plan	(1.0)	(0.5)
Acquisitions		0.0
Fair value of plan assets at end of year	$ 13.1	$ 14.0