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Income Taxes
 9 Months Ended
May 31, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Our effective tax rate for the three months ended May 31, 2025, was 10.5%, compared to 4.1% for the three months ended May 31, 2024. Our effective tax rate for the nine months ended May 31, 2025, was 7.3%, compared to 2.1% for the nine months ended May 31, 2024. Increased income tax expense during the three months ended May 31, 2025, resulted primarily from a change in state law that reduces the future utilization of state income tax credits. Our income tax expense reflects the mix of full-year earnings projected across business units and current equity management assumptions. Income taxes and effective tax rates vary each year based on profitability, changes in tax law, income tax credits, nonpatronage business activity and current equity management assumptions.
    Our uncertain tax positions are affected by the tax years that are under audit or remain subject to examination by the relevant taxing authorities. Reserves are recorded against unrecognized tax benefits when we believe certain fully supportable tax return positions are likely to be challenged, and we may not prevail. If we were to prevail on all positions taken in relation to uncertain tax positions, $71.7 million and $65.1 million of the unrecognized tax benefits would ultimately benefit our effective tax rate as of May 31, 2025, and August 31, 2024, respectively. It is reasonably possible that the total amount of unrecognized tax benefits could change significantly in the next 12 months.