Post Retirement Benefit Plans - Changes in Accumulated Other Comprehensive (Income) or Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Defined Benefit Plan, Changes in Accumulated Other Comprehensive (Income) Loss [Roll Forward]
Accumulated other comprehensive loss at beginning of year	$ 188.6	$ 198.8
Net transition obligation amortized during fiscal year	0.0	(0.1)
Net prior service costs amortized during fiscal year	0.2	(0.1)
Net loss amortized during fiscal year	(11.4)	(14.2)
Prior service cost recognized during fiscal year due to curtailment	0.0	(0.3)
Transition obligation recognized during fiscal year due to curtailment	0.0	(0.2)
Loss recognized during fiscal year due to settlement	(0.1)	(0.1)
Prior service credit occurring during fiscal year	0.5	(3.2)
Liability loss occurring during fiscal year	69.8	8.4
Asset loss (gain) occurring during fiscal year	(39.4)	7.5
Increase (decrease) in accumulated other comprehensive loss	19.6	(2.3)
Foreign currency impact	(8.4)	(7.9)
Accumulated other comprehensive loss at current fiscal year end	$ 199.8	$ 188.6