Earnings Per Share (Tables)

6 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

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

The following table sets forth the numerators and denominators used in the computation of basic and diluted earnings per share. Stock options to purchase 6.4 million shares of common stock were excluded from the computation of diluted earnings per share for the 2016 periods because their effect would have been antidilutive.

	Three Months Ended   March 31,				Six Months Ended   March 31,
	2017		2016		2017		2016
	(In millions)
Numerator:
Net income	$	229.2	$	195.1	$	436.1	$	352.8
Denominator:
Denominator for basic earnings per share — weighted average common shares	374.4		370.2		373.8		369.7
Effect of dilutive securities:
Employee stock awards	4.5		3.5		4.3		3.9
Denominator for diluted earnings per share — adjusted weighted average common shares	378.9		373.7		378.1		373.6
Basic net income per common share	$	0.61	$	0.53	$	1.17	$	0.95
Net income per common share assuming dilution	$	0.60	$	0.52	$	1.15	$	0.94