Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Statement [Abstract]
Net revenue	$ 550.2	$ 706.9
Cost of goods sold	366.5	471.9
Gross profit	183.7	235.0
Selling, general, and administrative expenses	149.2	171.1
Amortization expense	22.8	25.2
Pension settlement gain	0.0	(1.7)
Pre-tax gain (loss)	3.4	0.0
Interest expense, net	20.2	25.1
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	(11.9)	15.3
Income tax (benefit) expense	(12.9)	6.4
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1.0	8.9
Less: Net income attributable to noncontrolling interests	3.2	2.5
Net (loss) income attributable to Hillenbrand	$ (2.2)	$ 6.4
Basic (loss) earnings per share
Income from continuing operations attributable to Hillenbrand (in dollars per share)	$ (0.03)	$ 0.09
Diluted (loss) earnings per share
Income from continuing operations attributable to Hillenbrand (in dollars per share)	$ (0.03)	$ 0.09
Weighted average shares outstanding (basic)	70.9	70.6
Weighted average shares outstanding (diluted)	70.9	70.6