Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10.7	$ 10.2	$ 8.9
Interest cost	5.0	4.4	4.3
Recognized actuarial loss	(16.6)	0.8	10.7
Net periodic pension cost	8.2	10.0	8.3
Net Periodic Benefit Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	10.7	10.2	8.9
Interest cost	5.0	4.4	4.3
Expected return on plan assets	(9.2)	(7.3)	(6.6)
Recognized actuarial loss	1.7	2.7	1.7
Net periodic pension cost	$ 8.2	$ 10.0	$ 8.3