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EMPLOYEE STOCK BENEFIT PLANS (Stock Based Compensation Expense) (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares of common stock reserved for issuance pursuant to stock plans, options, and conversions of preferred stock       109
Shares available to be granted for active plans 104      
Total stock-based compensation expense $ 199 $ 205 $ 235  
Deferred tax benefit related to stock-based compensation expense $ 59 69 77  
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period of stock-based compensation award, in years 4 years      
Maximum contractual term of options 10 years      
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period of stock-based compensation award, in years 4 years      
Total stock-based compensation expense $ 95 89 82  
Market share units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period of stock-based compensation award, in years 4 years      
Minimum payout factor percentage 60.00%      
Maximum payout factor percentage 200.00%      
Total stock-based compensation expense $ 35 37 36  
Long-term performance awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 69 $ 79 $ 117