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 ($)
$ / shares in Units, $ in Millions
 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
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 $ 35  
Weighted-average period over which cost is expected to be recognized 2 years  
Value of share awards vested $ 20 $ 19
Performance Awards    
Nonvested shares    
Weighted-average volatility rate 30.00%  
Risk-free interest rate (as a percent) 0.70%  
Performance Awards | Minimum    
Weighted Average Grant-Date Fair Value    
Performance period 2 years  
Performance Awards | Maximum    
Weighted Average Grant-Date Fair Value    
Performance period 3 years  
Equity Awards    
Nonvested shares    
Nonvested at the beginning of the period (in shares) 1,821,000  
Granted (in shares) 831,000  
Vested (in shares) (749,000)  
Forfeited (in shares) (6,000)  
Nonvested at the end of the period (in shares) 1,897,000  
Weighted Average Grant-Date Fair Value    
Nonvested at the beginning of the period (in dollars per share) $ 17.37  
Granted (in dollars per share) 23.48  
Vested (in dollars per share) 17.27  
Forfeited (in dollars per share) 20.60  
Nonvested at the end of the period (in dollars per share) $ 17.02  
Liability Awards    
Nonvested shares    
Nonvested at the beginning of the period (in shares) 492,000  
Granted (in shares) 256,000  
Vested (in shares) (258,000)  
Forfeited (in shares) (6,000)  
Nonvested at the end of the period (in shares) 484,000  
Weighted Average Grant-Date Fair Value    
Nonvested at the beginning of the period (in dollars per share) $ 18.50  
Granted (in dollars per share) 22.77  
Vested (in dollars per share) 17.09  
Forfeited (in dollars per share) 20.69  
Nonvested at the end of the period (in dollars per share) $ 21.48  
Restricted stock units    
Nonvested shares    
Vested (in shares) (35,574)  
Weighted Average Grant-Date Fair Value    
The number of restricted stock units vested at the balance sheet date (in shares) 423,873