EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

Basic and diluted income per share are computed by dividing net income by the weighted average number of common shares outstanding.  Diluted net income per share reflects the dilutive effect of stock-based compensation.

	Years ended December 31,
Computation of Income per Share	2012		2011		2010
	(In millions, except per share data)
Net income	$	149.6	$	241.7	$	64.8
Basic shares:	80.1		80.0		79.2
Basic net income per share	$	1.87	$	3.02	$	0.82
Diluted shares:
Basic shares	80.1		80.0		79.2
Stock-based compensation	0.9		0.8		0.7
Diluted shares	81.0		80.8		79.9
Diluted net income per share	$	1.85	$	2.99	$	0.81

The computation of dilutive shares from stock-based compensation does not include 1.0 million, 0.9 million and 1.3 million shares in 2012, 2011 and 2010, respectively, as their effect would have been anti-dilutive.