EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2012

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Share Table

	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