Employee Benefits (Schedule of Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 10.2	$ 8.9	$ 8.8
Interest cost	4.4	4.3	4.6
Amortization of transitional (asset) or obligation	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.0
Recognized actuarial loss	0.8	10.7	7.5
Net periodic pension cost	10.0	8.3	8.9
Net Periodic Benefit Cost [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	10.2	8.9	8.8
Interest cost	4.4	4.3	4.6
Expected return on plan assets	(7.3)	(6.6)	(6.0)
Amortization of transitional (asset) or obligation	0.0	0.0	0.0
Amortization of prior service cost	0.0	0.0	0.0
Recognized actuarial loss	2.7	1.7	1.5
Net periodic pension cost	$ 10.0	$ 8.3	$ 8.9