Income Taxes - Additional Information (Detail) € in Millions	6 Months Ended	12 Months Ended
	Apr. 30, 2017 USD ($)	Oct. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Oct. 31, 2015 USD ($)	Oct. 31, 2017 EUR (€)	Jul. 31, 2017 USD ($)	Apr. 30, 2017 EUR (€)
Operating Loss Carryforwards [Line Items]
Income (loss) before income tax expense		$ 200,300,000	$ 141,200,000	$ 114,800,000
Increase (decrease) in valuation allowances		$ 40,300,000
Percentage of rate impact in valuation allowance		20.74%	1.91%	3.00%
Increase in effective tax rate		28.00%
Decrease in effective tax rate from foreign tax rates and permanent book-tax differences		15.90%
Balance sheet remeasurement rate		0.00%	0.00%	5.90%
Effect of change in exchange rate in net income				$ 19,400,000
Net income tax benefit				0
Deferred tax assets, operating loss carryforwards, foreign		$ 38,600,000
Net operating loss and other carryforwards		116,400,000	$ 83,000,000
Valuation allowance		132,400,000	92,100,000
Long-term debt		959,200,000	974,600,000
Deferred tax liabilities, undistributed foreign earnings		2,000,000				$ 3,600,000
Undistributed foreign earnings		646,400,000
Unrecognized tax benefits		26,800,000	28,500,000	28,500,000
Accrued interest and penalties related to unrecognized tax benefits		3,700,000	5,600,000
Minimum
Operating Loss Carryforwards [Line Items]
Net decrease in unrecognized tax benefits for the next 12 months		0
Maximum
Operating Loss Carryforwards [Line Items]
Net decrease in unrecognized tax benefits for the next 12 months		5,000,000
Intercompany Financing
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowances		$ 38,600,000
Percentage of rate impact in valuation allowance		19.26%
Valuation allowance		$ 38,600,000
Non-U.S.
Operating Loss Carryforwards [Line Items]
Income (loss) before income tax expense		85,200,000	49,900,000	44,800,000
Valuation allowance		127,300,000	89,900,000
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Income (loss) before income tax expense		115,100,000	91,300,000	$ 70,000,000
Valuation allowance		5,100,000	$ 2,300,000
Euro Member Countries, Euro
Operating Loss Carryforwards [Line Items]
Long-term debt | €					€ 187.0
Debt repayment, remitted earnings, current period		187,000,000
United States of America, Dollars
Operating Loss Carryforwards [Line Items]
Long-term debt | €							€ 203.9
Debt repayment, remitted earnings, current period	$ 203,900,000
Debt repayment, remitted earnings, prior period		$ 104,000,000