SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) - USD ($) $ in Millions	3 Months Ended						49 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Aug. 31, 2015
Class of Stock [Line Items]
Stock Repurchased During Period, Value	$ 28	$ 12	$ 13	$ 12	$ 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)							6,700,000
Stock Repurchased During Period, Value							$ 491