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Leases - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2021
Leases [Abstract]      
Weighted average discount rate (percent) 3.50% 2.50%  
Weighted average remaining lease term 6 years    
Cash paid for operating lease liabilities $ 20.1 $ 18.5 $ 26.2
ROU assets obtained in exchange for lease liabilities 29.9 $ 37.3  
Operating lease asset group impairment charge $ 4.3   $ 0.0