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Income Taxes (Tables)
9 Months Ended
Jun. 30, 2023
Income Tax Disclosure [Abstract]  
Schedule of Income Tax Expense and Effective Tax Rate The following summarizes income tax expense and the effective tax rate in each interim period:
Three months ended
June 30
Nine months ended
June 30
(In millions)2023202220232022
Income tax expense$22.9 $13.2 $14.2 $32.6 
Effective tax rate percentage26.2 %24.9 %10.2 %25.2 %