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Income taxes
3 Months Ended
Nov. 30, 2021
Income Tax Disclosure [Abstract]  
Income taxes Income taxes
The effective tax rate for the three months ended November 30, 2021 was an expense of 7.2%, primarily due to lower tax expense on gains from consolidation of the Company’s investment in VillageMD and Shields, as a portion of these gains is not subject to tax. See Note 3 Acquisitions for further information.

The effective tax rate for the three months ended November 30, 2020 was a benefit of 34.0%, on a pretax loss for the three months ended November 30, 2020, primarily due to the discrete tax effect of equity losses in AmerisourceBergen. See Note 6 Equity method investments for further information.

Income taxes paid for the three months ended November 30, 2021 were $34 million, compared to $16 million for the three months ended November 30, 2020.