NET INCOME PER SHARE (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The following table presents the computation of basic and diluted net income per share for the three and nine months ended September 30, 2014, and 2013 (in millions, except per share amounts):

	Three Months Ended   September 30,				Nine Months Ended   September 30,
	2014		2013		2014		2013
Numerator:
Net income	$	123.7	$	156.8	$	272.0	$	504.8
Denominator:
Weighted-average shares outstanding used in basic calculation	36.1		38.6		37.1		39.6
Add: Dilutive effect of potential common shares	0.8		0.7		0.8		0.9
Weighted-average shares used in computing diluted net income per share	36.9		39.3		37.9		40.5
Net income per share:
Basic	$	3.43	$	4.06	$	7.33	$	12.75
Diluted	$	3.35	$	3.99	$	7.18	$	12.46