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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2024
Mar. 31, 2023
Income Tax Disclosure [Abstract]        
Effective tax rate 18.40% 25.10% 19.60% 24.80%
Unrecognized tax benefit $ 75.4   $ 75.4