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SHARE-BASED AND OTHER COMPENSATION PLANS (Details - Share-settled Awards - Outstanding share-settled awards) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2017
Dec. 31, 2017
Dec. 31, 2016
RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incurred incremental compensation expense   $ 71  
Total unrecognized compensation cost (net of expected forfeitures) and the weighted-average periods over which those costs are expected to be recognized      
Unrecognized Compensation Cost $ 0 $ 0  
Expected Period   3 years  
RSUs | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incurred incremental compensation expense   $ 142  
SICO Plans      
Change in number of shares      
Unvested at the end of the period (in shares) 0 0  
Total unrecognized compensation cost (net of expected forfeitures) and the weighted-average periods over which those costs are expected to be recognized      
Weighted-Average Period   5 years 29 days  
Expected Period   21 years  
2013 LTI | PSUs      
Change in number of shares      
Unvested at the beginning of the period (in shares) 576,210 1,581,904  
Net impact of modification   0  
Granted (in shares) 0    
Vested (in shares) 968,930 0  
Forfeited (in shares) 36,764 0  
Cancelled at modification date (in shares) 0    
Granted at modification date (in shares) 0    
Unvested at the end of the period (in shares) 576,210 576,210 1,581,904
Change in Weighted Average Grant-Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 38.04 $ 38.03  
Net impact of modification   0  
Granted (in dollars per share) 0    
Vested (in dollars per share) 37.98 0  
Forfeited (in dollars per share) 39.14 0  
Cancelled at modification date (in dollars per share) 0    
Granted at modification date (in dollars per share) 0    
Unvested at the end of the period (in dollars per share) $ 38.04 $ 38.04 $ 38.03
2014 LTI | PSUs      
Change in number of shares      
Unvested at the beginning of the period (in shares) 823,311 1,732,616  
Net impact of modification   0  
Granted (in shares) 122,378    
Vested (in shares) 957,045 0  
Forfeited (in shares) 74,638 0  
Cancelled at modification date (in shares) 0    
Granted at modification date (in shares) 0    
Unvested at the end of the period (in shares) 823,311 823,311 1,732,616
Change in Weighted Average Grant-Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 48.81 $ 48.88  
Net impact of modification   0  
Granted (in dollars per share) 48.57    
Vested (in dollars per share) 48.89 0  
Forfeited (in dollars per share) 49.02 0  
Cancelled at modification date (in dollars per share) 0    
Granted at modification date (in dollars per share) 0    
Unvested at the end of the period (in dollars per share) $ 48.81 $ 48.81 $ 48.88
2015 LTI | PSUs      
Change in number of shares      
Unvested at the beginning of the period (in shares) 1,853,843 2,176,555  
Net impact of modification   (135,244)  
Granted (in shares) 0    
Vested (in shares) 201,256 424,788  
Forfeited (in shares) 121,456 2,023  
Cancelled at modification date (in shares) (2,229,873)    
Granted at modification date (in shares) 2,094,629    
Unvested at the end of the period (in shares) 1,291,788 1,291,788 2,176,555
Change in Weighted Average Grant-Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 55.17 $ 55.52  
Net impact of modification   56.33  
Granted (in dollars per share) 0    
Vested (in dollars per share) 59.04 61.82  
Forfeited (in dollars per share) 55.01 62.13  
Cancelled at modification date (in dollars per share) 54.56    
Granted at modification date (in dollars per share) 62.13    
Unvested at the end of the period (in dollars per share) $ 60.02 $ 60.02 $ 55.52
2016 LTI | PSUs      
Change in number of shares      
Unvested at the beginning of the period (in shares) 2,270,203 2,588,598  
Net impact of modification   (304,551)  
Granted (in shares) 2,806    
Vested (in shares) 182,938 495,222  
Forfeited (in shares) 138,263 2,685  
Cancelled at modification date (in shares) (2,951,417)    
Granted at modification date (in shares) 2,646,866    
Unvested at the end of the period (in shares) 1,467,745 1,467,745 2,588,598
Change in Weighted Average Grant-Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 50.37 $ 51.12  
Net impact of modification   55.01  
Granted (in dollars per share) 36.49    
Vested (in dollars per share) 60.29 62.13  
Forfeited (in dollars per share) 51.1 62.13  
Cancelled at modification date (in dollars per share) 52    
Granted at modification date (in dollars per share) 62.13    
Unvested at the end of the period (in dollars per share) $ 60.9 $ 60.9 $ 51.12
2017 LTI | PSUs      
Change in number of shares      
Unvested at the beginning of the period (in shares) 2,940,046 0  
Net impact of modification   0  
Granted (in shares) 3,996,978    
Vested (in shares) 971,945 766,931  
Forfeited (in shares) 84,987 0  
Cancelled at modification date (in shares) (1,082,417)    
Granted at modification date (in shares) 1,082,417    
Unvested at the end of the period (in shares) 2,173,115 2,173,115 0
Change in Weighted Average Grant-Date Fair Value      
Unvested at the beginning of the period (in dollars per share) $ 65.07 $ 0  
Net impact of modification   0  
Granted (in dollars per share) 64.83    
Vested (in dollars per share) 64.09 64.01  
Forfeited (in dollars per share) 65.24 0  
Cancelled at modification date (in dollars per share) 67.47    
Granted at modification date (in dollars per share) 62.13    
Unvested at the end of the period (in dollars per share) $ 62.78 $ 62.78 $ 0
Total unrecognized compensation cost (net of expected forfeitures) and the weighted-average periods over which those costs are expected to be recognized      
Unrecognized Compensation Cost     $ 237
Weighted-Average Period   1 year 7 days  
Expected Period   3 years