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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Income Tax Expense From Continuing Operations And The Effective Tax Rate
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 %