CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 46.5	$ 39.3
Other comprehensive income (loss), net of tax:
Change in fair value of derivative instruments	0	1.4
Employee pension and postretirement benefits	1.0	1.5
Currency translation adjustments	8.6	(8.1)
Total other comprehensive income (loss), net of tax	9.6	(5.2)
Comprehensive income	56.1	34.1
Comprehensive (income) loss attributable to the noncontrolling interest	0	(0.4)
Comprehensive income attributable to Oshkosh Corp.	$ 56.1	$ 33.7