Other Comprehensive Income (Loss) - Schedule of reclassifications (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016	Jun. 30, 2015
Affected Line in the Consolidated Statement of Operations:
Net revenue		$ (371.0)	[1]	$ (398.7)	[1]	$ (1,109.7)	$ (1,204.8)
Cost of goods sold		227.5		259.8		695.3	778.9
Operating expenses		87.2		79.1		256.6	247.0
Other income (expense), net		0.3		1.3		1.9	6.3
Total before tax		(42.2)		(46.3)		(111.4)	(133.3)
Tax expense		(10.9)		(13.8)		(31.9)	(39.9)
Total reclassifications for the period, net of tax	[2]	(30.7)		(32.1)		(76.8)	(92.3)
Reclassifications out of accumulated other comprehensive income (loss)
Affected Line in the Consolidated Statement of Operations:
Net revenue		(0.4)		0.6		(0.1)	1.9
Cost of goods sold		0.7		1.1		2.0	3.1
Operating expenses		0.3		0.4		0.8	1.2
Other income (expense), net		(0.2)		0.4		0.0	1.5
Total before tax		0.4		2.5		2.7	7.7
Tax expense		(0.4)		0.7		1.9	2.4
Total reclassifications for the period, net of tax		0.0		1.8		0.8	5.3
Net Loss Recognized | Reclassifications out of accumulated other comprehensive income (loss)
Affected Line in the Consolidated Statement of Operations:
Net revenue		0.0		0.0		0.0	0.0
Cost of goods sold		0.6		0.9		1.8	2.6
Operating expenses		0.3		0.3		0.7	1.0
Other income (expense), net		0.0		0.0		0.0	0.0
Total before tax		0.9		1.2		2.5	3.6
Prior Service Costs Recognized | Reclassifications out of accumulated other comprehensive income (loss)
Affected Line in the Consolidated Statement of Operations:
Net revenue		0.0		0.0		0.0	0.0
Cost of goods sold		0.1		0.1		0.2	0.4
Operating expenses		0.0		0.1		0.1	0.2
Other income (expense), net		0.0		0.0		0.0	0.0
Total before tax		0.1		0.2		0.3	0.6
Derivative Instruments | Reclassifications out of accumulated other comprehensive income (loss)
Affected Line in the Consolidated Statement of Operations:
Net revenue		(0.4)		0.6		(0.1)	1.9
Cost of goods sold		0.0		0.1		0.0	0.1
Operating expenses		0.0		0.0		0.0	0.0
Other income (expense), net		(0.2)		0.4		0.0	1.5
Total before tax		$ (0.6)		$ 1.1		$ (0.1)	$ 3.5

[1] We attribute revenue to a geography based upon the location of the legal entity that consummates the external sale.

[2] Net income attributable to Hillenbrand