Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Retirement Benefits, Description [Abstract]
Service cost	$ 2.7	$ 2.5	$ 8.1	$ 7.5
Interest cost	1.3	1.1	3.8	3.3
Expected return on plan assets	(2.3)	(1.8)	(6.9)	(5.4)
Recognized net actuarial loss	0.4	0.7	1.2	2.1
Net periodic pension cost	$ 2.1	$ 2.5	$ 6.2	$ 7.5