Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			$ (1.4)
Other comprehensive income before reclassifications
Before tax amount			12.2
Tax benefit (expense)			(1.0)
After tax amount			11.2
Amounts reclassified from accumulated other comprehensive income			0.8
Total changes in other comprehensive income (loss), net of tax	0.7	(19.9)	12.0	(8.6)
Balance at the end of the period	10.5		10.5
Total attributable to Hillenbrand, Inc.
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(1.4)
Other comprehensive income before reclassifications
Before tax amount			12.1
Tax benefit (expense)			(1.0)
After tax amount			11.1
Amounts reclassified from accumulated other comprehensive income			0.8
Total changes in other comprehensive income (loss), net of tax			11.9
Balance at the end of the period	10.5		10.5
Pension and Postretirement
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(33.0)
Other comprehensive income before reclassifications
Before tax amount			2.4
Tax benefit (expense)			(0.7)
After tax amount			1.7
Amounts reclassified from accumulated other comprehensive income			1.4
Total changes in other comprehensive income (loss), net of tax			3.1
Balance at the end of the period	(29.9)		(29.9)
Currency Translation
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			31.4
Other comprehensive income before reclassifications
Before tax amount			8.5
After tax amount			8.5
Total changes in other comprehensive income (loss), net of tax			8.5
Balance at the end of the period	39.9		39.9
Net Unrealized Gain (Loss) on Derivative Instruments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			0.2
Other comprehensive income before reclassifications
Before tax amount			1.2
Tax benefit (expense)			(0.3)
After tax amount			0.9
Amounts reclassified from accumulated other comprehensive income			(0.6)
Total changes in other comprehensive income (loss), net of tax			0.3
Balance at the end of the period	0.5		0.5
Noncontrolling Interests
Other comprehensive income before reclassifications
Before tax amount			0.1
After tax amount			0.1
Total changes in other comprehensive income (loss), net of tax			$ 0.1