Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details 5)

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INVESTMENTS (Details 5) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale securities, within 1 year, cost $ 1,433  
Available-for-sale securities, within 1 year, fair value 1,491  
Available-for-sale securities, after 1 years through 5 years, cost 3,929  
Available-for-sale securities, after 1 years through 5 years, fair value 3,983  
Available-for-sale securities, after 5 years through 10 years, cost 103  
Available-for-sale securities, after 5 years through 10 years, fair value 117  
Available-for-sale securities, after 10 years, cost 317  
Available-for-sale securities, after 10 years, fair value 321  
Cost Method Investments [Abstract]    
Cost method investments, carrying value $ 143 $ 140