Employee Benefits (Schedule of Reconciliation of Prepaid (Accrued) Pension Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Prepaid (Accrued) Pension Cost [Roll Forward]
Accrued pension cost at prior fiscal year end	$ (4.0)	$ (5.7)	$ (6.8)
Net periodic benefit cost	10.0	8.3	8.9
Contributions made during the year	10.0	10.0	10.0
Accrued pension cost at fiscal year end	$ (4.0)	$ (4.0)	$ (5.7)