Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2012

Net Income Per Common Share

Summary of earnings per share basic and diluted

(In millions, except per share data)	2012		2011		2010
Net income	$	164.3	$	135.5	$	77.4
Basic net income per common share:
Weighted average common shares outstanding	100.2		98.8		97.6
Basic net income per common share	$	1.64	$	1.37	$	0.79
Diluted net income per common share:
Weighted average common shares outstanding — Basic	100.2		98.8		97.6
Plus incremental shares from assumed conversions:
Restricted stock units	0.8		0.9		1.0
Stock options	1.0		1.0		1.3
Weighted average common shares outstanding — Diluted	102.0		100.7		99.9
Diluted net income per common share	$	1.61	$	1.35	$	0.77
Anti-dilutive shares outstanding, excluded from computation	0.5		0.3		0.8