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Derivative Financial Instruments and Hedging Activities - Derivatives (Details)
$ in Thousands, bbl in Millions
 6 Months Ended 12 Months Ended
Feb. 29, 2024
USD ($)
bbl
Aug. 31, 2023
USD ($)
bbl
Derivative [Line Items]    
Derivative Liability, Noncurrent $ 1,600 $ 12,600
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 252,469 295,646
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 15,848 17,196
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 261,074 344,229
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 1,574 1,505
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet 15,848 17,196
Derivative Asset, Noncurrent, Excluding Fair Value Hedges 1,500 1,100
Foreign exchange derivatives | Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 13,084 20,072
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 3,796 12,330
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 383 1,469
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 0 0
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet 3,796 12,330
Derivative, Notional Amount 1,200,000 1,900,000
Commodity derivatives | Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 239,385 275,574
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 12,052 4,866
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 260,691 342,760
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 1,574 1,505
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet 12,052 $ 4,866
Interest rate swap derivatives    
Derivative [Line Items]    
Derivative, Notional Amount $ 150,000  
Cash Flow Hedging    
Derivative [Line Items]    
Aggregate notional amount of cash flow hedges (in barrels) | bbl 3.6 4.1