Note 14 - Earnings Per Share (Detail) - Earnings Per Share (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Income from continuing operations available to common shares (in Dollars)	$ 78.2	$ 62.4	$ 143.5	$ 112.7
Basic weighted average shares outstanding	263.6	296.7	264.7	297.0
Dilutive effect of non-participating share-based awards	2.0	1.4	2.0	1.6
Diluted weighted average common shares outstanding	265.6	298.1	266.7	298.6
Basic EPS from continuing operations (in Dollars per share)	$ 0.30	$ 0.21	$ 0.54	$ 0.38
Diluted EPS from continuing operations (in Dollars per share)	$ 0.29	$ 0.21	$ 0.54	$ 0.38
Share Based Awards [Member]
Weighted average shares excluded from diluted EPS because the effect would be anti-dilutive:
Weighted average shares excluded from diluted EPS	8.5	11.4	8.9	11.6
Notes [Member]
Weighted average shares excluded from diluted EPS because the effect would be anti-dilutive:
Weighted average shares excluded from diluted EPS	42.6	42.6	42.6	42.6
Note Hedges [Member]
Weighted average shares excluded from diluted EPS because the effect would be anti-dilutive:
Weighted average shares excluded from diluted EPS	(42.6)	(42.6)	(42.6)	(42.6)
Warrant [Member]
Weighted average shares excluded from diluted EPS because the effect would be anti-dilutive:
Weighted average shares excluded from diluted EPS	42.6	42.6	42.6	42.6