Derivative Financial Instruments and Hedging Activities - Gross Fair Values of Derivative Assets, Derivative Liabilities, and Margin Deposits (Cash Collateral) (Details) - USD ($) $ in Thousands	May 31, 2025	Aug. 31, 2024
Reconciliation of gross and net fair value of assets and liabilities subject to offsetting arrangements [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 159,111	$ 174,738
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	147,381	165,116
Derivative Liability, Fair Value, Gross Liability	172,037	246,279
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	159,825	235,056
Not Designated as Hedging Instrument \| Commodity derivatives
Reconciliation of gross and net fair value of assets and liabilities subject to offsetting arrangements [Line Items]
Derivative Asset, Fair Value, Gross Asset	123,756	165,709
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	118,982	163,187
Derivative Liability, Fair Value, Gross Liability	164,410	221,803
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	159,154	217,680
Not Designated as Hedging Instrument \| Foreign exchange derivatives
Reconciliation of gross and net fair value of assets and liabilities subject to offsetting arrangements [Line Items]
Derivative Asset, Fair Value, Gross Asset	35,355	9,029
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	28,399	1,929
Derivative Liability, Fair Value, Gross Liability	7,627	24,476
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 671	$ 17,376

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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