Employee Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, net gain	$ 16.6	$ (0.8)	$ (10.7)
Discount rate for determining benefit obligations at year end	4.42%	3.75%	3.74%
Projected defined benefit plan benefit obligation	$ 165.6
Projected defined accumulated benefit obligation	$ 145.7
Diversified portfolio, allocation of assets in equities	100.00%	100.00%	100.00%
Expected long-term return on diversified portfolio	8.00%
Company's contribution to the pension plan	$ 10.0	$ 10.0	$ 10.0
Expected future contribution in pension plan	$ 10.0
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	75.00%
Deferral contributions, net of forfeiture credits	$ 5.9	$ 5.2	$ 4.4
Projected benefit obligation, gain (loss), due to assumption changes	$ 19.0
Minimum [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Diversified portfolio, allocation of assets in equities	50.00%
Maximum [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Diversified portfolio, allocation of assets in equities	70.00%
Change In Assumptions For Defined Benefit Plans, Change In Demographic Experience [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, gain (loss), due to assumption changes	$ (2.4)
Change In Assumptions For Defined Benefit Plans, Change In Discount Rate [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, gain (loss), due to assumption changes	18.4
Change In Assumptions For Defined Benefit Plans, Change In Mortality Assumption [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, gain (loss), due to assumption changes	$ 0.6