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Income Taxes
3 Months Ended
Mar. 31, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our effective income tax rate for the three months ended March 31, 2023, was 22%, compared with 21% for the corresponding period of 2022. The increase in our effective tax rate for the three months ended March 31, 2023, was primarily attributable to non-taxable foreign earnings of our chemical joint venture and an increase in foreign tax rate.

The effective tax rate for the three months ended March 31, 2023, varied from the U.S. federal statutory income tax rate primarily due to state income taxes, partially offset by the impact of foreign operations and noncontrolling interest.
On August 16, 2022, the U.S. government enacted the Inflation Reduction Act of 2022 (IRA) that includes, among other provisions, changes to the U.S. corporate income tax system, including 15% minimum tax based on adjusted financial statement income as defined in the IRA, which was effective after December 31, 2022. We do not anticipate owing 2023 corporate alternative minimum tax as the regular U.S. tax liability is forecasted to exceed the corporate alternative minimum tax.