Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Service cost	$ 2.5	$ 2.3	$ 5.0	$ 4.6
Interest cost	1.1	1.2	2.2	2.5
Expected return on plan assets	(1.8)	(1.6)	(3.6)	(3.3)
Recognized net actuarial loss	0.7	0.4	1.4	0.8
Net periodic pension cost	$ 2.5	$ 2.3	$ 5.0	$ 4.6