Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Income Tax Disclosure [Abstract]
Effective tax rate	49.70%	33.70%	13.10%	42.60%
Income tax provision (benefit) on continuing operations	$ 3.9	$ 10.6	$ (3.8)	$ 8.0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 7.9	$ 31.4	$ (29.0)	$ 18.7

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details

- Definition

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

+ References

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+ Details