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Fair Value of Financial Instruments - Fair Value of Financial Instruments (Detail) - USD ($)
$ in Millions
Aug. 31, 2022
Aug. 31, 2021
Carrying (Reported) Amount, Fair Value Disclosure    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable [1] $ 1,289.0 $ 913.8
Estimate of Fair Value, Fair Value Disclosure    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes payable $ 1,231.2 $ 935.9
[1] Carrying amount disclosed in this table excludes debt discount and debt issuance costs.