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Income Taxes - Tax Carryforwards (Details)
$ in Millions
Aug. 31, 2022
USD ($)
Domestic - federal  
Operating Loss Carryforwards [Line Items]  
Income tax net operating loss carryforwards $ 13
Tax credit carryforwards 7
Domestic - federal | Tax capital loss carryforwards  
Operating Loss Carryforwards [Line Items]  
Tax credit carryforwards 76
Domestic - state  
Operating Loss Carryforwards [Line Items]  
Income tax net operating loss carryforwards 54
Tax credit carryforwards 4
Foreign  
Operating Loss Carryforwards [Line Items]  
Income tax net operating loss carryforwards 567
Tax credit carryforwards $ 4