Employee Benefits (Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Retirement Benefits [Abstract]
Net (gain) loss	$ (9.3)	$ (8.1)	$ 15.4
Amortizations of net (gain)	(1.7)	(2.7)	(1.7)
Total recognized in other comprehensive income	(11.0)	(10.8)	13.7
Total recognized in net periodic benefit cost and other comprehensive income	$ (2.8)	$ (0.8)	$ 22.0