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Income Taxes
3 Months Ended
Nov. 30, 2020
Income Tax Disclosure [Abstract]  
Income Taxes Our effective tax rate for the three months ended November 30, 2020, was (54.0)%, compared to 3.6% for the three months ended November 30, 2019. The decreased effective tax rate reflects tax benefits resulting from changes in the mix of full-year projected earnings, including losses in business units and equity management assumptions allowing for a patronage deduction on profitable business units, as well as an anticipated intercompany transfer of assets resulting in a tax benefit.    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, $114.4 million and $111.3 million of the unrecognized tax benefits would ultimately benefit our effective tax rate as of November 30, 2020, and August 31, 2020, respectively. It is reasonably possible that the total amount of unrecognized tax benefits could significantly change in the next 12 months.