Employee Benefits (Schedule of Reconciliation of Prepaid (Accrued) Pension Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Prepaid (Accrued) Pension Cost [Roll Forward]
Accrued pension cost at prior fiscal year end	$ 4.0	$ 4.0	$ 5.7
Net periodic benefit cost	8.2	10.0	8.3
Contributions made during the year	(10.0)	(10.0)	(10.0)
Accrued pension cost at fiscal year end	$ 2.2	$ 4.0	$ 4.0