v3.25.2
Income Taxes (Tables)
6 Months Ended
Jun. 30, 2025
Income Tax Disclosure [Abstract]  
Schedule of Effective Tax Rate
At the end of each interim period, we make our best estimate of the annual effective tax rate and the impact of discrete items, if any, and adjust the rate as necessary.
Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
(Dollars in millions)
Income before income tax expense$4.4 $28.9 $29.4 $57.1 
Income tax expense0.9 5.6 6.5 12.7 
Effective tax rate20.5 %19.4 %22.1 %22.2 %