Earnings Per Share (Tables)

3 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Numerator and denominator used to compute basic and diluted earnings per share

	Three Months Ended December 31,
	2013		2012
	(In millions)
Numerator:
Net income	$	123.2	$	66.3
Effect of dilutive securities:
Interest expense and amortization of issuance costs associated with convertible senior notes, net of tax, if applicable	6.8		5.7
Numerator for diluted earnings per share after assumed conversions	$	130.0	$	72.0
Denominator:
Denominator for basic earnings per share — weighted average common shares	323.1		321.1
Effect of dilutive securities:
Employee stock awards	2.7		4.4
Convertible senior notes	38.6		38.6
Denominator for diluted earnings per share — adjusted weighted average common shares	364.4		364.1