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Income Taxes
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
 2025202420252024
 (Dollars in millions)
Income tax expense$58.9 $59.6 $177.9 $179.6 
Effective tax rate22 %23 %22 %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 “Act”). The tax regulations included in the Act did not have a material impact on the Company’s effective tax rate for the periods presented, and the Company does not expect the Act to have a material impact on its effective tax rate for 2025. The Company is currently evaluating the impact that the tax regulations may have on its financial statements in future years.