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Derivative Financial Instruments and Hedging Activities - Derivatives (Details)
$ in Thousands, bbl in Millions
 9 Months Ended 12 Months Ended
May 31, 2025
USD ($)
bbl
Aug. 31, 2024
USD ($)
bbl
Derivative [Line Items]    
Derivative Liability, Noncurrent $ 1,300 $ 6,000
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 147,381 165,116
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 11,730 9,622
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 159,825 235,056
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 482 1,601
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet 11,730 9,622
Derivative Asset, Noncurrent, Excluding Fair Value Hedges 4,800 2,900
Foreign exchange derivatives | Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 28,399 1,929
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 6,956 7,100
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 671 17,376
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 0 0
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet 6,956 7,100
Derivative, Notional Amount 2,300,000 1,500,000
Commodity derivatives | Not Designated as Hedging Instrument    
Derivative [Line Items]    
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 118,982 163,187
Derivative Asset, Fair Value, Gross Amount Not Offset on Balance Sheet 4,774 2,522
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 159,154 217,680
Derivative Liability, Collateral, Right to Reclaim Cash, Offset 482 1,601
Derivative Liability, Fair Value, Gross Amount Not Offset on Balance Sheet $ 4,774 $ 2,522
Cash Flow Hedging    
Derivative [Line Items]    
Aggregate notional amount of cash flow hedges (in barrels) | bbl 6.5 5.5