Equity and Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 957.9	$ 1,059.9
Other comprehensive income (loss), net of tax	$ 30.1	$ (24.7)	65.5	(6.1)
Ending balance	1,042.7	994.2	1,042.7	994.2
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			33.4	(5.3)
Other comprehensive income (loss), net of tax			33.4	(5.3)
Ending balance	(236.8)	(261.9)	(236.8)	(261.9)
Interest Rate Derivative
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			0.0
Other Comprehensive Income Before Reclassifications			4.0
Other comprehensive income (loss), net of tax			4.0
Ending balance	4.0		4.0
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			29.8	3.5
Other comprehensive income (loss), net of tax			29.8	3.5
Ending balance	(98.4)	(117.3)	(98.4)	(117.3)
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			67.2	(1.8)
Other comprehensive income (loss), net of tax			67.2	(1.8)
Ending balance	$ (331.2)	$ (379.2)	$ (331.2)	$ (379.2)