Derivative Financial Instruments and Hedging Activities - Fair Value of Commodity Derivative Instruments (Details) - USD ($) $ in Thousands	Feb. 28, 2022	Aug. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 573,049	$ 453,367
Derivative Asset, Fair Value, Gross Asset	885,009	568,749
Cash Flow Hedging \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	2,162	1,001
Derivative Asset, Fair Value, Gross Asset	$ 4,296	$ 11,874

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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