Net Income per Share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Schedule of earnings per share, basic and diluted

The Company computed basic and diluted net income per share as follows (in millions, except per share amounts):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Numerator:
Net income	$	221.1	$	97.9	$	331.7	$	188.9
Denominator:
Weighted-average shares used to compute   basic net income per share	470.3		503.0		478.1		503.8
Dilutive effect of employee stock awards	6.2		3.3		9.2		6.6
Weighted-average shares used to compute   diluted net income per share	476.5		506.3		487.3		510.4
Net income per share:
Basic	$	0.47	$	0.19	$	0.69	$	0.37
Diluted	$	0.46	$	0.19	$	0.68	$	0.37
Anti-dilutive:
Potential anti-dilutive shares	28.0		39.4		26.8		24.3