Earnings (Loss) Per Share (Tables)

12 Months Ended

Sep. 30, 2011

Earnings (Loss) Per Share [Abstract]

Numerator and denominator used to compute basic and diluted earnings (loss) per share

	Year Ended September 30,
	2011		2010		2009
	(In millions)
Numerator:
Net income (loss)	$	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