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Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Income Taxes
Effective tax rate (as a percent)	23.60%	29.90%
Tax at federal statutory rate (as a percent)	21.00%	21.00%
Tax benefit related to income tax credits and incentives	$ 46.1	$ 35.7
Tax expense related to foreign residual income	39.7	32.2
Tax expense related to state income taxes	18.2
Exclusion of tax on non-controlling interests	8.4
Tax expense related to valuation allowances	7.4	$ 21.0
Tax expense related to audit settlement	6.9
Nondeductible costs	5.6
Gross book-tax differences from non-U.S. subsidiaries	$ 1,300.0

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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