Net Income per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

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

	Three Months Ended March 31,
	2013		2012
Numerator:
Net income	$	91.0	$	16.3
Denominator:
Weighted-average shares used to compute basic net income per share	504.7		527.2
Dilutive effect of employee stock awards	8.0		6.5
Weighted-average shares used to compute diluted net income per share	512.7		533.7
Net income per share:
Basic	$	0.18	$	0.03
Diluted	$	0.18	$	0.03