Note 14 - Income Taxes (Detail) - Aggregate changes in the balance of unrecognized tax benefits (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Beginning balance	$ 116.4	$ 83.8	$ 91.5
Ending Balance	111.5	116.4	83.8
Increases related to prior year tax positions	2.2	7.7	23.6
Decreases related to prior year tax positions	(8.8)	(1.9)	(1.6)
Increases related to current year tax positions	4.9	36.5	11.6
Decreases related to current year tax positions	(3.2)	(1.1)	(5.8)
Reductions due to lapse of statute of limitations		(8.6)
Reductions for settlements with taxing authorities			$ (35.5)