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Derivative Financial Instruments and Hedging Activities - Schedule of Notional Volumes for Commodity Contracts (Details) - Not Designated as Hedging Instrument bu in Thousands, bbl in Thousands, T in Thousands, MMBTU in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
May 31, 2026 MMBTU T bu bbl | Aug. 31, 2025 MMBTU T bu bbl
Grain and oilseed (bushels) | Long |  |
Derivative [Line Items] |  |
Notional amount, volume | bu | 651,221 | 468,345
Grain and oilseed (bushels) | Short |  |
Derivative [Line Items] |  |
Notional amount, volume | bu | 943,050 | 702,025
Energy products (barrels) | Long |  |
Derivative [Line Items] |  |
Notional amount, volume | bbl | 14,232 | 10,059
Energy products (barrels) | Short |  |
Derivative [Line Items] |  |
Notional amount, volume | bbl | 11,716 | 6,687
Processed grain and oilseed (tons) | Long |  |
Derivative [Line Items] |  |
Notional amount, mass | 1,028 | 1,168
Processed grain and oilseed (tons) | Short |  |
Derivative [Line Items] |  |
Notional amount, mass | 2,161 | 2,429
Crop nutrients (tons) | Long |  |
Derivative [Line Items] |  |
Notional amount, mass | 27 | 29
Crop nutrients (tons) | Short |  |
Derivative [Line Items] |  |
Notional amount, mass | 8 | 32
Natural gas (metric million Btu) | Long |  |
Derivative [Line Items] |  |
Notional amount, energy measure | MMBTU | 240 | 180
Natural gas (metric million Btu) | Short |  |
Derivative [Line Items] |  |
Notional amount, energy measure | MMBTU | 0 | 0

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