Employee Benefits - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.42%	3.75%	3.74%
Discount rate, increase	0.67%
Projected defined benefit plan benefit obligation	$ 158.5
Projected defined accumulated benefit obligation	143.7
Actuarial loss (gain)	$ 36.6	$ (16.6)	$ 0.8
Expected long-term return on diversified portfolio	8.00%
Company's contribution to the pension plan	$ 13.1	10.0	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	$ 6.5	$ 5.9	$ 5.2
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)	$ 33.8
Change In Assumptions For Defined Benefit Plans, Change In Demographic Experience
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	2.6
Change In Assumptions For Defined Benefit Plans, Change In Discount Rate
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	43.5
Change In Assumptions For Defined Benefit Plans, Change In Mortality Assumption
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	(0.4)
Change In Assumptions For Defined Benefit Plans, Change In Termination Rates
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	(3.9)
Change In Assumptions For Defined Benefit Plans, Change In Salary Increase Rates
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	(1.7)
Change In Assumptions For Defined Benefit Plans, Addition Of Assumptions To Reflect Expected Lump Sum Payments
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	0.3
Change In Assumptions For Defined Benefit Plans, Change In Discount Rate Methodology
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss (gain)	$ (4.0)