Hillenbrand, Inc. Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Timing of Transfer (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 693.7	$ 607.5	$ 648.9	$ 566.9	$ 485.8	$ 446.6	$ 464.6	$ 410.3	$ 2,517.0	$ 1,807.3	$ 1,770.1
Point in time
Disaggregation of Revenue [Line Items]
Revenues									1,897.5	1,214.2
Over time
Disaggregation of Revenue [Line Items]
Revenues									619.5	593.1
Advanced Process Solutions
Disaggregation of Revenue [Line Items]
Revenues									1,228.6	1,274.4
Advanced Process Solutions \| Point in time
Disaggregation of Revenue [Line Items]
Revenues									609.1	681.3
Advanced Process Solutions \| Over time
Disaggregation of Revenue [Line Items]
Revenues									619.5	593.1
Molding Technology Solutions
Disaggregation of Revenue [Line Items]
Revenues									735.8	0.0	0.0
Molding Technology Solutions \| Point in time
Disaggregation of Revenue [Line Items]
Revenues									735.8
Molding Technology Solutions \| Over time
Disaggregation of Revenue [Line Items]
Revenues									0.0
Batesville
Disaggregation of Revenue [Line Items]
Revenues									552.6	532.9	$ 550.6
Batesville \| Point in time
Disaggregation of Revenue [Line Items]
Revenues									552.6	532.9
Batesville \| Over time
Disaggregation of Revenue [Line Items]
Revenues									$ 0.0	$ 0.0