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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Jan. 31, 2021 | Oct. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |  |
Effective tax rate | (499.10%) | 10.60% |  |
Deferred tax asset, intra-entity sale of certain intellectual property rights |  |  | $ 1,987.9 |
Unrecognized tax benefits | $ 353.8 | $ 58.5 |  | $ 49.7
Unrecognized tax benefits that would impact the effective tax rate | 336.5 | 46.0 |  | 41.7
Accrued gross interest and penalties related to uncertain tax positions | 6.4 | $ 7.3 |  | $ 3.9
Significant change in unrecognized tax benefits that is reasonably possible during the next twelve months | 4.2 |  |  |
Domestic Tax Authority |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 63.7 |  |  |
Federal net operating losses expiring | 47.5 |  |  |
Federal net operating losses not subject to expiration | 16.2 |  |  |
State and Local Jurisdiction |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 19.7 |  |  |
Research Tax Credit Carryforward |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Research credit | $ 1.0 |  |  |

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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from intra-entity transfer of asset within consolidated group. Excludes intra-entity transfer of inventory. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32621-109319 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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