Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Tax Disclosure
Effective income tax rate	25.20%	25.20%	24.90%
Undistributed earnings of foreign subsidiaries	$ 3.0	$ 4.2
Income (loss) from continuing operations before income taxes, foreign	$ (1.5)	$ 2.0	$ 2.0