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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Aug. 31, 2020
Operating Loss Carryforwards [Line Items]      
Income tax expense (benefit) $ 132,116 $ (38,249) $ (36,731)
Deferred Tax Liabilities, Net 139,019 101,528  
Income (Loss) from Continuing Operations before Income Taxes, Domestic 1,800,000 497,500 324,400
Income (Loss) from Continuing Operations before Income Taxes, Foreign $ (4,900) $ 17,800 $ 62,500
Statutory federal income tax rate 21.00% 21.00% 21.00%
Operating Loss Carryforwards $ 500,200    
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 242,400    
Amount of unrecognized tax benefits that would benefit effective tax rate 115,100    
Unrecognized Tax Benefits, Interest on Income Taxes Expense 700 $ 1,400 $ 1,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 3,300 2,500  
State tax credit      
Operating Loss Carryforwards [Line Items]      
Tax credit carryforward, amount 122,800    
NCRA | State tax credit      
Operating Loss Carryforwards [Line Items]      
Tax credit carryforward, amount $ 122,800 $ 129,700