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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2022
Mar. 31, 2021
Income Tax Disclosure [Abstract]        
Effective tax rate 22.70% 17.00% 18.80% 22.60%
Unrecognized tax benefit $ 66.2   $ 66.2