Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References+ Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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+ Details

Earnings (Loss) Per Share (Details) (USD $) In Millions	3 Months Ended								12 Months Ended
Earnings (Loss) Per Share (Details) (USD $) In Millions	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Numerator
Net income (loss)	$ 35.7	$ 28.7	$ 27.8	$ (20.4)	$ (8.9)	$ 50.5	$ 11.4	$ 192.0	$ 71.8	$ 245.1	$ (549.8)
Denominator:
Denominator for basic earnings (loss) per share - weighted average common shares									318.3	318.1	316.9
Effect of dilutive securities:
Employee stock awards									0.2	0.5
Denominator for diluted earnings (loss) per share - adjusted weighted average common shares									318.5	318.6	316.9
Earnings per share (Textuals) [Abstract]
Number of shares excluded from computation of earnings per share									9.9	10.2