STOCK (Tables)

6 Months Ended

Jun. 30, 2012

STOCK

Schedule of changes in common shares and treasury stock

(In millions)	Common Shares Issued	Treasury Stock	Cost of Treasury Stock
Balance as of January 1, 2012	205.1	1.4	$	89.7
Stock-based compensation	0.8	0.2	14.8
Treasury stock purchases	—	0.5	44.0
Balance as of June 30, 2012	205.9	2.1	$	148.5
Balance as of January 1, 2011	204.8	0.1	$	3.2
Stock-based compensation	0.1	—	0.1
Treasury stock purchases	—	0.8	54.1
Balance as of June 30, 2011	204.9	0.9	$	57.4