Quarterly report pursuant to Section 13 or 15(d)

Other Comprehensive Income (Loss) - Schedule of changes in accumulated other comprehensive income (loss) (Details)

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Other Comprehensive Income (Loss) - Schedule of changes in accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]        
Balance at the beginning of the period     $ (81.2)  
Other comprehensive income before reclassifications        
Before tax amount     (5.3) $ 26.4
Tax expense     0.0 (5.3)
After tax amount     (5.3) 21.1
Amounts reclassified from accumulated other comprehensive income(1) [1]     2.5 2.4
Total changes in other comprehensive income (loss), net of tax $ (25.5) $ 26.5 (2.8) 23.5
Balance at the end of the period (83.7)   (83.7)  
Pension and Postretirement        
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]        
Balance at the beginning of the period     (45.3) (67.5)
Other comprehensive income before reclassifications        
Before tax amount     0.0 11.3
Tax expense     0.0 (4.1)
After tax amount     0.0 7.2
Amounts reclassified from accumulated other comprehensive income(1) [1]     2.1 2.5
Total changes in other comprehensive income (loss), net of tax     2.1 9.7
Balance at the end of the period (43.2) (57.8) (43.2) (57.8)
Currency Translation        
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]        
Balance at the beginning of the period     (36.9) (61.6)
Other comprehensive income before reclassifications        
Before tax amount     (4.8) 11.4
Tax expense     0.0 0.0
After tax amount     (4.8) 11.4
Amounts reclassified from accumulated other comprehensive income(1) [1]     0.0 0.0
Total changes in other comprehensive income (loss), net of tax     (4.8) 11.4
Balance at the end of the period (41.7) (50.2) (41.7) (50.2)
Net Unrealized Gain (Loss) on Derivative Instruments        
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]        
Balance at the beginning of the period     1.0 (0.7)
Other comprehensive income before reclassifications        
Before tax amount     (0.2) 3.4
Tax expense     0.0 (1.2)
After tax amount     (0.2) 2.2
Amounts reclassified from accumulated other comprehensive income(1) [1]     0.4 (0.1)
Total changes in other comprehensive income (loss), net of tax     0.2 2.1
Balance at the end of the period 1.2 1.4 1.2 1.4
Total Attributable to Hillenbrand, Inc.        
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]        
Balance at the beginning of the period     (81.2) (129.8)
Other comprehensive income before reclassifications        
Before tax amount     (5.0) 26.1
Tax expense     0.0 (5.3)
After tax amount     (5.0) 20.8
Amounts reclassified from accumulated other comprehensive income(1) [1]     2.5 2.4
Total changes in other comprehensive income (loss), net of tax     (2.5) 23.2
Balance at the end of the period $ (83.7) $ (106.6) (83.7) (106.6)
Noncontrolling Interests        
Other comprehensive income before reclassifications        
Before tax amount     (0.3) 0.3
Tax expense     0.0 0.0
After tax amount     (0.3) 0.3
Amounts reclassified from accumulated other comprehensive income(1) [1]     0.0 0.0
Total changes in other comprehensive income (loss), net of tax     $ (0.3) $ 0.3
[1] Amounts are net of tax.