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Income Taxes
 6 Months Ended
Jun. 30, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The following table presents income tax expense and the effective tax rate:
 Three Months Ended June 30,Six Months Ended June 30,
 2025202420252024
 (Dollars in millions)
Income tax expense$59.9 $60.1 $119.0 $120.0 
Effective tax rate22 %23 %23 %23 %
The effective tax rate for each of the periods in the table above differed from the statutory federal rate of 21%, due to state income taxes and U.S. taxes on foreign earnings, net of foreign tax credits, partially offset by a lower foreign effective tax rate.
House Resolution 1, commonly referred to as the One Big Beautiful Bill Act, was enacted into law on July 4, 2025. The Company is currently evaluating the impact that the tax regulations included in the Act will have on its financial statements.