Note 3 - Receivables (Detail) - Customer Financing, Recorded Investment (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2010
Recorded Investment (principal and interest due, net of deferred interest and fees)
Individually evaluated for impairment	$ 131.0		$ 104.2
Collectively evaluated for impairment	292.0		260.7
Total	423.0		364.9
Allowances for Credit Losses
Individually evaluated for impairment	57.4		58.6
Collectively evaluated for impairment	12.6		12.8
Total	$ 70.0	$ 70.5	$ 71.4	$ 68.1	$ 78.0	$ 78.4