SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) - USD ($) $ in Millions	3 Months Ended		43 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Aug. 31, 2015
Class of Stock [Line Items]
Stock Repurchased During Period, Value	$ 13	$ 13
2015 1 Billion Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount				$ 1,000
Stock repurchased during period (shares)			6,100,000
Stock Repurchased During Period, Value			$ 451
Shares	214,891	185,661
Amount	$ 13	$ 13