Earnings Per Share (Tables)

9 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

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

	Three Months Ended June 30,				Nine Months Ended June 30,
	2014		2013		2014		2013
	(In millions)
Numerator:
Net income	$	113.1	$	146.0	$	367.3	$	323.2
Effect of dilutive securities:
Interest and amortization of issuance costs associated with convertible senior notes, net of tax	2.8		6.0		16.5		17.5
Numerator for diluted earnings per share after assumed conversions	$	115.9	$	152.0	$	383.8	$	340.7
Denominator:
Denominator for basic earnings per share — weighted average common shares	349.7		322.6		332.4		321.8
Effect of dilutive securities:
Employee stock awards	3.2		4.4		3.1		4.6
Convertible senior notes	14.9		38.6		30.7		38.6
Denominator for diluted earnings per share — adjusted weighted average common shares	367.8		365.6		366.2		365.0