Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net revenue	$ 695.1	$ 607.5	$ 2,109.9	$ 1,823.3
Cost of goods sold	469.2	400.2	1,393.9	1,250.5
Gross profit	225.9	207.3	716.0	572.8
Operating expenses	126.6	118.5	396.2	411.9
Amortization expense	14.1	16.4	41.8	55.2
Gain (Loss) on Disposition of Business	(0.1)	0.0	(65.8)	3.0
Impairment charges	0.0	0.0	0.0	82.5
Interest expense	19.0	19.7	59.7	55.3
Other (expense) income, net	(0.4)	0.6	0.2	4.8
Income (loss) before income taxes	65.9	53.3	284.3	(30.3)
Income tax expense	24.4	28.3	86.1	17.7
Consolidated net income (loss)	41.5	25.0	198.2	(48.0)
Less: Net income attributable to noncontrolling interests	1.1	1.0	3.3	5.1
Net income (loss)	$ 40.4	$ 24.0	$ 194.9	$ (53.1)
Net income (loss) attributable to Hillenbrand — per share of common stock:
Basic earnings (loss) per share	$ 0.54	$ 0.32	$ 2.59	$ (0.73)
Diluted earnings (loss) per share	$ 0.53	$ 0.32	$ 2.57	$ (0.73)
Weighted average shares outstanding (basic)	75.5	75.1	75.4	72.8
Weighted average shares outstanding (diluted)	76.2	75.1	75.9	72.8