Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
General Discussion of Pension and Other Postretirement Benefits [Abstract]
Service cost	$ 2.7	$ 2.5
Interest cost	1.3	1.1
Expected return on plan assets	(2.3)	(1.8)
Recognized net actuarial loss	0.4	0.7
Net periodic pension cost	$ 2.1	$ 2.5