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EARNINGS PER SHARE (Details 2)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
RSUs
       
Anti-dilutive weighted average common shares        
Potentially dilutive securities excluded from calculation of diluted earnings per share (in shares) 0.8 21.3 1.3 21.7
PSUs
       
Anti-dilutive weighted average common shares        
Potentially dilutive securities excluded from calculation of diluted earnings per share (in shares) 3.3 1.8 3.3 1.8