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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2013
STOCK-BASED COMPENSATION  
Schedule of pre-tax compensation expense and the related income tax benefit for these stock-based incentives

 Pre-tax compensation expense and the related income tax benefit for these stock-based incentives were as follows, in millions:

 
   2013   2012   2011  

Long-term stock awards

   $ 34   $ 35   $ 39  

Stock options

     13     15     21  

Phantom stock awards and stock appreciation rights

     7     11     1  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Total

   $ 54   $ 61   $ 61  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
               

Income tax benefit (37 percent tax rate – before valuation allowance)

   $ 20   $ 23   $ 23  
               
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
               

        
Schedule of the Company's long-term stock award activity

 The Company's long-term stock award activity was as follows, shares in millions:

 
   2013   2012   2011  

Unvested stock award shares at January 1

     8     10     10  

Weighted average grant date fair value

   $ 16   $ 17   $ 19  

Stock award shares granted

    
2		    
1		    
2		  

Weighted average grant date fair value

   $ 20   $ 12   $ 13  

Stock award shares vested

    
2		    
2		    
2		  

Weighted average grant date fair value

   $ 17   $ 18   $ 20  

Stock award shares forfeited

    
—		    
1		    
—		  

Weighted average grant date fair value

   $ 16   $ 17   $ 18  

Unvested stock award shares at December 31

    
8		    
8		    
10		  

Weighted average grant date fair value

   $ 17   $ 16   $ 17  

        
Schedule of the Company's stock option activity

The Company's stock option activity was as follows, shares in millions:

 
   2013   2012   2011  

Option shares outstanding, January 1

     30     36     37  

Weighted average exercise price

   $ 21   $ 21   $ 21  

Option shares granted

    
1		    
1		    
2		  

Weighted average exercise price

   $ 20   $ 12   $ 13  

Option shares exercised

    
3		    
1		    
—		  

Aggregate intrinsic value on date of exercise (A)

   $ 23 million   $ 5 million   $ 1 million  

Weighted average exercise price

   $ 12   $ 10   $ 8  

Option shares forfeited

    
4		    
6		    
3		  

Weighted average exercise price

   $ 26   $ 19   $ 22  

Option shares outstanding, December 31

    
24		    
30		    
36		  

Weighted average exercise price

   $ 22   $ 21   $ 21  

Weighted average remaining option term (in years)

     4     5     5  

Option shares vested and expected to vest, December 31

    
24		    
30		    
36		  

Weighted average exercise price

   $ 22   $ 21   $ 21  

Aggregate intrinsic value (A)

   $ 109 million   $ 55 million   $ 12 million  

Weighted average remaining option term (in years)

     4     5     5  

Option shares exercisable (vested), December 31

    
20		    
23		    
24		  

Weighted average exercise price

   $ 24   $ 24   $ 25  

Aggregate intrinsic value (A)

   $ 62 million   $ 22 million   $ 4 million  

Weighted average remaining option term (in years)

     3     4     4  
(A)
Aggregate intrinsic value is calculated using the Company's stock price at each respective date, less the exercise price (grant date price) multiplied by the number of shares.

        
Schedule of weighted average grant date fair value of option shares granted and the assumptions used to estimate those values using a Black-Scholes option pricing model

 

 

 
   2013   2012   2011  

Weighted average grant date fair value

   $ 8.35   $ 4.44   $ 5.07  

Risk-free interest rate

     1.22 %   1.09 %   2.69 %

Dividend yield

     1.47 %   2.57 %   2.35 %

Volatility factor

     49.07 %   50.97 %   49.03 %

Expected option life

     6 years     6 years     6 years  

        
Summary of stock option shares outstanding and exercisable

The following table summarizes information for stock option shares outstanding and exercisable at December 31, 2013, shares in millions:

Option Shares Outstanding   Option Shares Exercisable  
Range of
Prices		   Number of
Shares		   Weighted
Average
Remaining
Option
Term		   Weighted
Average
Exercise
Price		   Number of
Shares		   Weighted
Average
Exercise
Price		  
$ 8 - 21     13   6 Years   $ 14     8   $ 15  
$ 26 - 28     3   2 Years   $ 27     3   $ 27  
$ 29 - 31     8   2 Years   $ 30     9   $ 30  
$ 33 - 36     —   2 Years   $ 34     —   $ 34  
                             
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
$ 8 - 36     24   4 Years   $ 22     20   $ 24  
                             
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
                             

        
Schedule of phantom stock awards and SARs

Information related to phantom stock awards and SARs was as follows, in millions:

 
   Phantom
Stock
Awards		   Stock
Appreciation
Rights		  
 
   At December 31,   At December 31,  
 
   2013   2012   2013   2012  

Accrued compensation cost liability

   $ 14   $ 11   $ 8   $ 6  

Unrecognized compensation cost

   $ 4   $ 5   $ —   $ 1  

Equivalent common shares

     1     1     2     2