Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Details 4)

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FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS (Details 4) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Other Fair Value Disclosures [Abstract]    
Long-term Debt $ 34,480 $ 33,211
Long-term Debt, Fair Value $ 35,169 $ 33,752