Note 4 - Receivables (Detail) - Allowances for Credit Losses (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Accounts Receivable:
Ending balance	$ 72.8	$ 71.4
Accounts Receivable [Member]
Accounts Receivable:
Beginning balance	17.6	24.6	23.4
Charge-offs	(2.8)	(10.7)	(5.5)
Recoveries	1.1	0.1	0.6
Provisions	3.2	3.6	6.1
Ending balance	19.1	17.6	24.6
Customer Financing [Member]
Accounts Receivable:
Beginning balance	71.4	78.4	33.2
Charge-offs	(10.4)	(9.3)	(8.2)
Recoveries			0.6
Provisions	11.8	2.3	52.8
Ending balance	72.8	71.4	78.4
Current [Member]
Accounts Receivable:
Ending balance	51.6	41.7	39.8
NonCurrent [Member]
Accounts Receivable:
Ending balance	$ 21.2	$ 29.7	$ 38.6