Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Retirement Benefits, Description [Abstract]
Service cost	$ 2.5	$ 2.7
Interest cost	1.5	1.3
Expected return on plan assets	(2.4)	(2.3)
Recognized net actuarial loss	0.2	0.4
Net periodic pension cost	$ 1.8	$ 2.1