Note 3 - Receivables (Detail) - Customer Financing, Recorded Investment (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Recorded Investment (principal and interest due, net of deferred interest and fees)
Individually evaluated for impairment	$ 117.6		$ 123.2
Collectively evaluated for impairment	294.8		307.1
Total	412.4		430.3
Allowances for Credit Losses
Individually evaluated for impairment	67.4		59.9
Collectively evaluated for impairment	13.2		12.9
Total	$ 80.6	$ 76.6	$ 72.8	$ 70.5	$ 70.1	$ 71.4