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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 |  |  |  |  |

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