Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net revenue	$ 742.0	$ 722.3	$ 1,470.4	$ 1,414.8
Cost of goods sold	498.7	476.4	989.8	924.7
Gross profit	243.3	245.9	480.6	490.1
Operating expenses	131.8	138.0	259.9	269.6
Amortization expense	13.7	14.1	27.4	27.7
(Gain) loss on divestitures	0.0	(34.1)	3.1	(65.7)
Interest expense	17.3	19.5	35.2	40.7
Other income, net	4.7	1.0	3.6	0.6
Income before income taxes	85.2	109.4	158.6	218.4
Income tax expense	29.4	30.4	52.7	61.7
Consolidated net income	55.8	79.0	105.9	156.7
Less: Net income attributable to noncontrolling interests	1.5	0.9	2.6	2.2
Net income attributable to Hillenbrand	$ 54.3	$ 78.1	$ 103.3	$ 154.5
Earnings Per Share [Abstract]
Basic earnings per share	$ 0.74	$ 1.04	$ 1.42	$ 2.05
Diluted earnings per share	$ 0.74	$ 1.03	$ 1.40	$ 2.04
Weighted average shares outstanding (basic)	73.1	75.5	72.9	75.4
Weighted average shares outstanding (diluted)	73.7	76.2	73.5	75.8