Note 10 - Credit Facilities and Indebtedness (Detail) - Credit Facilities and Indebtedness (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2011
Principal Debt Obligations	$ 1,930.0	$ 1,650.0
Total outstanding debt, net	1,969.8	1,646.3
3.25% Convertible Notes [Member]
Discounts	(68.6)	(93.5)
7.5% Bonds [Member]
Discounts	(2.1)	(2.3)
5.5% Bonds [Member]
Discounts	(1.0)	(1.1)
7.5% Bonds [Member]
Swap Fair Value Adjustment	72.1	61.8
5.5% Bonds [Member]
Swap Fair Value Adjustment	39.4	31.4
Credit Facilities [Member]
Principal Debt Obligations	280.0
3.25% Convertible Notes [Member]
Principal Debt Obligations	850.0	850.0
7.5% Bonds [Member]
Principal Debt Obligations	500.0	500.0
5.5% Bonds [Member]
Principal Debt Obligations	$ 300.0	$ 300.0