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Income Taxes
 6 Months Ended
Jun. 30, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Income tax expense relating to continuing operations of $2.4 and $3.5 for the three months ended June 30, 2023 and 2022, respectively, represents taxes on both U.S. and foreign earnings at a combined effective income tax rate of 22.9% and 20.5%, respectively. Income tax (benefit) expense of $(4.3) and $5.6 for the six months ended June 30, 2023 and 2022, respectively, represents taxes on both U.S and foreign earnings at a combined effective income tax rate of 39.1% and 18.8%, respectively.
The effective income tax rates of 22.9% and 39.1% for the three and six months ended June 30, 2023 differed from the U.S. federal statutory rate of 21% primarily due to income earned by our certain foreign entities being taxed at higher rates than the U.S. federal statutory rate, the U.S. taxation of international operations with the expanded global footprint and transaction costs from the Howden Acquisition offset by research and development credits and excess tax benefits associated with share-based compensation.
The effective income tax rates of 20.5% and 18.8% for the three and six months ended June 30, 2022 differed from the U.S. federal statutory rate of 21% primarily due to income incurred by some of our foreign operations for which no detriment was recorded, partially offset by the effect of income earned by our certain foreign entities being taxed at higher rates than the U.S. federal statutory rate and excess tax benefits associated with share-based compensation.