Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Service cost	$ 2.5	$ 2.3	$ 7.5	$ 6.9
Interest cost	1.1	1.2	3.3	3.7
Expected return on plan assets	(1.8)	(1.6)	(5.4)	(4.9)
Recognized net actuarial loss	0.7	0.4	2.1	1.2
Net periodic pension cost	$ 2.5	$ 2.3	$ 7.5	$ 6.9