Net Income Per Share (Tables)

6 Months Ended

Jul. 31, 2011

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The following table sets forth the computation of the numerators and denominators used in the basic and diluted net income per share amounts:

	Three Months Ended July 31,				Six months ended July 31,
	2011		2010		2011		2010
Numerator:
Net income	$	71.2	$	59.9	$	140.5	$	96.8
Denominator:
Denominator for basic net income per share—weighted average shares		229.4		228.0		228.8		228.5
Effect of dilutive securities		7.2		5.8		8.1		6.0
Denominator for dilutive net income per share		236.6		233.8		236.9		234.5
Basic net income per share	$	0.31	$	0.26	$	0.61	$	0.42
Diluted net income per share	$	0.30	$	0.25	$	0.59	$	0.41