Net Income Per Share (Tables)

9 Months Ended

Oct. 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 October 31,				Nine months ended October 31,
	2011		2010		2011		2010
Numerator:
Net income	$	72.8	$	53.6	$	213.3	$	150.4
Denominator:
Denominator for basic net income per share—weighted average shares		227.1		226.5		228.2		227.9
Effect of dilutive securities		3.6		5.9		5.5		5.5
Denominator for dilutive net income per share		230.7		232.4		233.7		233.4
Basic net income per share	$	0.32	$	0.24	$	0.93	$	0.66
Diluted net income per share	$	0.32	$	0.23	$	0.91	$	0.64