Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table shows the computation of our basic and diluted net income per common share (in millions, except per share amounts):

	Three Months Ended March 31
	2013		2012
Numerator:
Net income	$	27.1	$	30.3
Denominator:
Weighted average shares outstanding - basic	46.9		46.7
Effect of dilutive securities:
Equity compensation plans	0.7		0.7
Convertible preferred stock	0.1		0.1
Weighted average shares outstanding - diluted	47.7		47.5
Basic earnings per share	$	0.58	$	0.65
Diluted earnings per share	$	0.57	$	0.64