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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Income Tax Disclosure [Abstract]        
Effective tax rate 15.00% 18.40% 18.00% 19.60%
Unrecognized tax benefit $ 90.9   $ 90.9