Equity and Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 957.9	$ 1,059.9
Other comprehensive income, net of tax	$ 11.9	$ 45.0	35.4	18.6
Ending balance	986.8	1,000.5	986.8	1,000.5
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(270.2)	(256.6)
Other Comprehensive Income Before Reclassifications			3.5	18.6
Other comprehensive income, net of tax			3.5	18.6
Ending balance	(266.7)	(238.0)	(266.7)	(238.0)
Interest Rate Derivative
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			0.0
Other Comprehensive Income Before Reclassifications			4.8
Other comprehensive income, net of tax			4.8
Ending balance	4.8		4.8
Minimum Pension Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(128.2)	(120.8)
Other Comprehensive Income Before Reclassifications			29.4	0.6
Other comprehensive income, net of tax			29.4	0.6
Ending balance	(98.8)	(120.2)	(98.8)	(120.2)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(398.4)	(377.4)
Other Comprehensive Income Before Reclassifications			37.7	19.2
Other comprehensive income, net of tax			37.7	19.2
Ending balance	$ (360.7)	$ (358.2)	$ (360.7)	$ (358.2)