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%)