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Income Taxes (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 31, 2018 | May 31, 2017 | May 31, 2018 | May 31, 2017 | Nov. 30, 2022 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |  |  |  |  |  |
Income tax expense | $ (21,000,000) | $ (20,200,000) | $ (138,300,000) | $ (27,400,000) |  |  |  |
Impact of Tax Reform |  |  | 111,200,000 |  |  |  |  |
Tax Cuts and Jobs Act of 2017 Incomplete Accounting Change in Tax Rate Provisional Income Tax Expense Benefit |  |  | 107,900,000 |  |  |  |  |
Deferred Tax Assets, Tax Credit Carryforwards | 50,000,000 |  | 50,000,000 |  |  |  |  |
Income Tax Credits and Adjustments | 200,000 | $ 100,000 | 4,200,000 | $ 1,200,000 |  |  |  |
Unrecognized Tax Benefits | 200,000 |  | 200,000 |  |  |  |  | $ 100,000
Net (increase) reduction in valuation allowance |  |  | (3,300,000) |  |  |  |  |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount - Other |  |  | 0 |  |  |  |  |
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense | (200,000) |  | (2,400,000) |  |  |  |  |
Valuation allowance | 26,900,000 |  | 26,900,000 |  |  |  |  | 23,600,000
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |
Deferred Tax Assets, Gross | $ 522,900,000 |  | $ 522,900,000 |  |  |  |  | $ 657,200,000
Effective Income Tax Rate Reconciliation, Percent | 26.80% | 38.90% | 111.20% | 37.30% |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit | $ 0 |  | $ 0 |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation | 1,000,000 |  | 1,000,000 |  |  |  |  |
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit | $ 200,000 |  | $ 200,000 |  |  |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |
Effective Income Tax Rate Reconciliation, Deduction, Percent |  |  |  |  |  | 50.00% |  |
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent |  |  |  |  | 6.60% |  |  |
Future Effective Federal Income Tax Rate Percent |  |  |  |  |  |  | (22.20%) |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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