Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net revenue	$ 566.9	$ 410.3
Cost of goods sold	395.1	263.3
Gross profit	171.8	147.0
Operating expenses	157.4	90.7
Amortization expense	14.8	7.8
Interest expense	14.7	5.5
Other income, net	1.9	0.5
(Loss) income before income taxes	(13.2)	43.5
Income tax (benefit) expense	(12.4)	14.5
Consolidated net (loss) income	(0.8)	29.0
Less: Net income attributable to noncontrolling interests	2.3	0.7
Net income (loss)	$ (3.1)	$ 28.3
Net income attributable to Hillenbrand — per share of common stock:
Basic (loss) earnings per share	$ (0.05)	$ 0.45
Diluted (loss) earnings per share	$ (0.05)	$ 0.45
Weighted average shares outstanding (basic)	68.4	62.9
Weighted average shares outstanding (diluted)	68.4	63.5