Post Retirement Benefit Plans - Fair Value of the Pension Plans Investments (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Change in plan assets:
Fair value of plan assets at beginning of year	$ 594.8	$ 568.6
Actual return on plan assets	140.1	(8.7)
Expenses paid	(5.9)	(1.7)
Plan participant contributions	0.2	0.2
Foreign currency impact	(0.7)	(6.9)
Employer contributions	22.7	81.7
Benefits paid out of plan	(57.8)	(38.4)
Acquisitions	323.6
Fair value of plan assets at end of year	1,017.0	594.8
United States
Change in plan assets:
Fair value of plan assets at beginning of year	311.9	268.6
Actual return on plan assets	93.4	(12.9)
Expenses paid	(5.1)	(1.0)
Plan participant contributions	0.0	0.0
Foreign currency impact	0.0	0.0
Employer contributions	21.0	80.0
Benefits paid out of plan	(46.1)	(22.8)
Acquisitions	323.6
Fair value of plan assets at end of year	698.7	311.9
Germany
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
Change in plan assets:
Fair value of plan assets at beginning of year	178.7	188.9
Actual return on plan assets	35.2	3.2
Expenses paid	(0.7)	(0.6)
Plan participant contributions	0.0	0.0
Foreign currency impact	1.3	(4.6)
Employer contributions	1.6	1.6
Benefits paid out of plan	(6.3)	(9.8)
Acquisitions	0.0
Fair value of plan assets at end of year	209.8	178.7
Netherlands
Change in plan assets:
Fair value of plan assets at beginning of year	90.6	97.5
Actual return on plan assets	10.7	(0.1)
Expenses paid	0.0	0.0
Plan participant contributions	0.2	0.2
Foreign currency impact	(2.1)	(1.8)
Employer contributions	0.0	0.0
Benefits paid out of plan	(4.9)	(5.2)
Acquisitions	0.0
Fair value of plan assets at end of year	94.5	90.6
Other International
Change in plan assets:
Fair value of plan assets at beginning of year	13.6	13.6
Actual return on plan assets	0.8	1.1
Expenses paid	(0.1)	(0.1)
Plan participant contributions	0.0	0.0
Foreign currency impact	0.1	(0.5)
Employer contributions	0.1	0.1
Benefits paid out of plan	(0.5)	(0.6)
Acquisitions	0.0
Fair value of plan assets at end of year	$ 14.0	$ 13.6