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Derivative Financial Instruments and Hedging Activities - Narrative (Details)
bbl in Millions, $ in Millions
12 Months Ended
Aug. 31, 2023
USD ($)
bbl
Aug. 31, 2022
USD ($)
bbl
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative Asset, Noncurrent, Excluding Fair Value Hedges $ 1.1 $ 8.5
Derivative Liability, Noncurrent, Excluding Fair Value Hedges $ 12.6 $ 4.0
Cash Flow Hedging [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Nonmonetary Notional Amount, Volume | bbl 4.1 3.8
Foreign exchange derivatives | Not Designated as Hedging Instrument    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount $ 1,900.0 $ 1,900.0