Equity and Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			$ 1,059.9	$ 1,223.2
Other comprehensive income (loss), net of tax	$ (24.7)	$ 4.7	(6.1)	(103.9)
Ending balance	994.2	1,092.5	994.2	1,092.5
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(256.6)	(144.5)
Other Comprehensive Income (Loss) Before Reclassifications			(5.3)	(87.7)
Amounts reclassified from Accumulated Other Comprehensive Loss				0.0
Other comprehensive income (loss), net of tax			(5.3)	(87.7)
Ending balance	(261.9)	(232.2)	(261.9)	(232.2)
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance				(0.1)
Other Comprehensive Income (Loss) Before Reclassifications				0.0
Amounts reclassified from Accumulated Other Comprehensive Loss				0.1
Other comprehensive income (loss), net of tax				0.1
Ending balance		0.0		0.0
Minimum Pension Liability Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(120.8)	(129.8)
Other Comprehensive Income (Loss) Before Reclassifications			3.5	5.5
Amounts reclassified from Accumulated Other Comprehensive Loss				0.0
Other comprehensive income (loss), net of tax			3.5	5.5
Ending balance	(117.3)	(124.3)	(117.3)	(124.3)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance			(377.4)	(274.4)
Other Comprehensive Income (Loss) Before Reclassifications			(1.8)	(82.2)
Amounts reclassified from Accumulated Other Comprehensive Loss				0.1
Other comprehensive income (loss), net of tax			(1.8)	(82.1)
Ending balance	$ (379.2)	$ (356.5)	$ (379.2)	$ (356.5)