Quarterly report pursuant to Section 13 or 15(d)

Business Acquisitions and Divestitures - Schedule of Aggregate Purchase Price Consideration (Details)

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Business Acquisitions and Divestitures - Schedule of Aggregate Purchase Price Consideration (Details) - Milacron - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 6 Months Ended
Nov. 21, 2019
Mar. 31, 2020
Business Acquisition [Line Items]    
Cash consideration paid to Milacron stockholders $ 835.9  
Repayment of Milacron debt, including accrued interest 772.9  
Cash consideration paid to settle outstanding share-based equity awards 34.2  
Total cash consideration 1,643.0  
Fair value of Hillenbrand common stock issued to Milacron stockholders 356.9  
Stock consideration issued to settle outstanding share-based equity awards 14.4  
Total consideration transferred 2,014.3  
Portion of cash settlement of outstanding share-based equity awards recognized as expense (14.1)  
Portion of stock settlement of outstanding share-based equity awards recognized as expense (5.9)  
Total purchase price consideration $ 1,994.3  
Business acquisition, common stock shares issued (in shares) 11.4  
Business acquisition, common stock shares issued (in in dollars per share) $ 31.26  
Shares issued to settle outstanding share-based equity awards (in shares) 0.5  
Settlement of outstanding share-based equity awards recognized as expense   $ 20.0