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Income Taxes
6 Months Ended
Feb. 29, 2020
Income Tax Disclosure [Abstract]  
Income Taxes
Our effective tax rate for the three months ended February 29, 2020, was 1.7%, compared to 5.2% for the three months ended February 28, 2019. Our effective tax rate for the six months ended February 29, 2020, was 2.8%, compared to 5.4% for the six months ended February 28, 2019. The decreased effective tax rate reflects the equity management assumptions used in fiscal 2020.

It is reasonably possible that the amount of unrecognized tax benefits could significantly change within the next 12 months. We have ongoing federal, state and international income tax audits in various jurisdictions and are evaluating uncertain tax positions that may be challenged by local tax authorities and not fully sustained. These uncertain tax positions are reviewed on an ongoing basis and adjusted in light of facts and circumstances, including progression of tax audits, developments in case law and closing of statutes of limitation. The total amounts of unrecognized tax benefits that, if recognized, would affect the effective tax rate as of February 29, 2020, and August 31, 2019, are $102.3 million and $93.3 million, respectively.