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EARNINGS PER SHARE (Potential common shares not included in computation of diluted earnings per share) (Details)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Earnings Per Share [Abstract]        
Stock options (in shares) 2.2 1.4 1.8 1.2