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Derivative Financial Instruments and Hedging Activities - Pretax Gains (Losses) Recorded in Other Comprehensive Income Relating to Cash Flow Hedges (Details) - USD ($) $ in Thousands | 12 Months Ended
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Aug. 31, 2023 | Aug. 31, 2022 | Aug. 31, 2021
Cash Flow Hedging [Member] | Commodity [Member] |  |  |
Derivative [Line Items] |  |  |
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), after Adjustments and Tax | $ (12,285) | $ (2,071) | $ (7,824)

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