DIVESTITURES Divestiture of Investment in MEGlobal (Details) - USD ($) $ in Millions		12 Months Ended
	Dec. 23, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Proceeds from Sale of Equity Method Investments		$ 64	$ 22	$ 1,528
Equity Method Investment, Realized Gain (Loss) on Disposal			$ 0	$ 0
MEGlobal [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Sale of Equity Method Investments	$ 1,472
Equity Method Investment, Realized Gain on Disposal Eliminated	555
Equity Method Investment, Realized Gain (Loss) on Disposal	723
Equity Method Investment, Realized Gain (Loss) on Disposal, after tax	$ 589
EQUATE Petrochemical Company K.S.C. [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	42.50%	42.50%	42.50%	42.50%