Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION PLANS (Details 2)

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STOCK-BASED COMPENSATION PLANS (Details 2) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Nonvested shares
   
Weighted Average Grant-Date Fair Value    
Total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Stock Incentive Plan $ 31  
Weighted-average period over which cost is expected to be recognized 2 years 1 month 6 days  
Value of share awards vested $ 17 $ 21
Equity Awards
   
Nonvested shares    
Nonvested at the beginning of the period (in shares) 1,789,000  
Granted (in shares) 774,000  
Vested (in shares) (732,000)  
Nonvested at the end of the period (in shares) 1,831,000  
Weighted Average Grant-Date Fair Value    
Nonvested at the beginning of the period (in dollars per share) $ 13.87  
Granted (in dollars per share) $ 17.85  
Vested (in dollars per share) $ 14.61  
Nonvested at the end of the period (in dollars per share) $ 15.26  
Liability Awards
   
Nonvested shares    
Nonvested at the beginning of the period (in shares) 638,000  
Granted (in shares) 268,000  
Vested (in shares) (314,000)  
Nonvested at the end of the period (in shares) 592,000  
Weighted Average Grant-Date Fair Value    
Nonvested at the beginning of the period (in dollars per share) $ 14.50  
Granted (in dollars per share) $ 17.85  
Vested (in dollars per share) $ 14.57  
Nonvested at the end of the period (in dollars per share) $ 15.88  
Restricted stock units
   
Nonvested shares    
Vested (in shares) (52,941)  
Weighted Average Grant-Date Fair Value    
The number of restricted stock units vested at the balance sheet date (in shares) 569,279