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STOCK-BASED COMPENSATION (Details 3) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Additional disclosures      
Number of Company's shares required to settle interests held by subsidiaries' management 2,000,000 2,200,000  
RSUs
     
Number of shares      
Nonvested at January 1, 2012 560,000    
Granted 191,000    
Vested (381,000)    
Forfeited       
Nonvested at December 31, 2012 370,000    
Weighted Average Grant Date Fair Value      
Nonvested at January 1, 2012 $ 31.06    
Granted $ 46.03    
Vested $ 27.08    
Forfeited       
Nonvested at December 31, 2012 $ 39.94    
Additional disclosures      
Vesting period 3 years    
PSUs
     
Number of shares      
Nonvested at January 1, 2012 4,541,000    
Granted 16,000    
Vested (2,671,000)    
Forfeited (616,000)    
Nonvested at December 31, 2012 1,270,000    
Weighted Average Grant Date Fair Value      
Nonvested at January 1, 2012 $ 24.41    
Granted $ 48.75    
Vested $ 21.19    
Forfeited $ 28.44    
Nonvested at December 31, 2012 $ 29.39    
PSUs | Minimum
     
Additional disclosures      
Vesting period 2 years    
PSUs | Maximum
     
Additional disclosures      
Vesting period 3 years    
Restricted stock, RSUs and PSUs
     
Weighted Average Grant Date Fair Value      
Granted $ 46.24 $ 32.41 $ 23.05
Additional disclosures      
Fair value of shares vested during period $ 139.0 $ 33.2 $ 23.6