Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.13%	4.42%	3.75%
Discount rate, decrease	1.29%
Projected defined benefit plan benefit obligation	$ 207.8
Projected defined accumulated benefit obligation	186.3
Actuarial loss (gain)	$ 20.0	$ 36.6	$ (16.6)
Expected long-term return on diversified portfolio	8.00%
Company's contribution to the pension plan	$ 23.4	13.1	10.0
Expected future contribution in pension plan	$ 10.0
Maximum annual contributions per employee in 401k savings plan	75.00%
Contributions by employer in 401k savings plan	$ 6.8	$ 6.5	$ 5.9
Minimum | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Diversified portfolio, allocation of assets in equities	50.00%
Maximum | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Diversified portfolio, allocation of assets in equities	70.00%
Change In Assumptions For Defined Benefit Plans, Change In Key Assumptions
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	$ 18.1
Change In Assumptions For Defined Benefit Plans, Change In Demographic Experience
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	1.9
Change In Assumptions For Defined Benefit Plans, Change In Discount Rate
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	11.0
Change In Assumptions For Defined Benefit Plans, Change In Lump Sum Determination
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	8.4
Change In Assumptions For Defined Benefit Plans, Change In Mortality Assumption
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	$ (1.3)