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STOCK-BASED COMPENSATION PLANS (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 17 $ 16 $ 16
Tax benefit related to stock-based compensation 7 6 6
Unrecognized stock-based compensation for non-vested options and awards $ 11    
Unrecognized stock-based compensation awards weighted-average period 8 months 12 days    
Shares remaining available for future grants of either options or stock awards (in shares) 36,000,000    
Shares authorized under stock-based compensation plans (in shares) 16,353,597    
Stock options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 2 $ 3 $ 3
Unrecognized stock-based compensation for non-vested options and awards $ 3    
Unrecognized stock-based compensation awards weighted-average period 1 year    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Expected volatility 53.00% 65.00% 67.00%
Expected term 6 years 6 years 6 years
Risk-free interest rate 1.67% 1.87% 1.10%
Expected dividend yield 1.25% 1.25% 0.00%
Weighted-average grant date fair value per share (in dollars per share) $ 28.71 $ 21.70 $ 14.74
Estimated fair value of options granted (millions) $ 3 $ 3 $ 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Outstanding, beginning balance (in shares) 707,688    
Granted (in Shares) 93,660    
Exercised (in shares) (255,717)    
Canceled (in shares) (1)    
Forfeited or expired (in shares) (5,285)    
Outstanding, ending balance (in shares) 540,345 707,688  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Outstanding, beginning balance, Weighted-Average Exercise Price Per Share (in dollars per share) $ 21.57    
Granted, Weighted-Average Exercise Price Per Share (in dollars per share) 65.30    
Exercised, Weighted-Average Exercise Price Per Share (in dollars per share) 15.97    
Canceled, Weighted-Average Exercise Price Per Share (in dollars per share) 38.76    
Fofeited or expired, Weighted-Average Exercise Price Per Share (in dollars per share) 44.56    
Outstanding, ending balance, Weighted-Average Exercise Price Per Share (in dollars per share) $ 31.58 $ 21.57  
Outstanding, Weighted-Average Contractual Life 6 years 3 months 18 days 6 years 4 months 24 days  
Outstanding, Aggregate Intrinsic Value $ 26 $ 27  
Exercisable, Outstanding (in shares) 195,873    
Exercisable, Weighted-Average Exercise Price Per Share (in dollars per share) $ 18.62    
Exercisable, Weighted-Average Contractual Life 5 years 7 months 6 days    
Exercisable, Aggregate Intrinsic Value $ 12    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]      
Vested or expected to vest, Shares 539,868    
Vested or expected to vest, Weighted-Average Exercise Price Per Share (in dollars per share) $ 31.57    
Vested or expected to vest, Weighted-Average Contractual Life 6 years 3 months 18 days    
Vested or expected to vest, Aggregate Intrinsic Value $ 26    
Intrinsic value of option exercises 14 20 19
Cash received from stock option exercises 4 6 8
Tax benefit related to stock option exercises 5 7 7
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value 3 2 3
Stock awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 11 $ 10 10
Unrecognized stock-based compensation for non-vested options and awards $ 8    
Unrecognized stock-based compensation awards weighted-average period 8 months 12 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested, beginning balance (in shares) 1,027,390    
Granted (in shares) 244,874    
Vested (in shares) (764,322)    
Forfeited (in shares) (37,227)    
Non-vested, ending balance (in shares) 470,715 1,027,390  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Non-vested, beginning balance, Weighted-Average Grant Date Fair Value (in dollars per share) $ 26.19    
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) 50.94    
Vested, Weighted-Average Grant Date Fair Value (in dollars per share) 26.33    
Forfeited, Weighted-Average Grant Date Fair Value (in dollars per share) 35.86    
Non-vested, ending balance, Weighted-Average Price Per Share (in dollars per share) $ 38.09 $ 26.19  
Non-vested, Weighted-Average Contractual Life 9 months 18 days 7 months 6 days  
Non-vested, Total Instrinsic Value (in dollars) $ 38 $ 61  
Deferred stock awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation 1 1 1
Employee stock purchase plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation $ 3 $ 2 $ 2
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Granted (in shares) 281,058 298,283 171,227
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent 85.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 10.00%