SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Aug. 31, 2015	May. 31, 2014
Class of Stock [Line Items]
Stock repurchased during period (shares)	1,721,413	1,580,747
Stock repurchased during period	$ 127	$ 102
2015 1 Billion Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)			$ 1,000
Stock repurchased during period (shares)	1,721,413
Stock repurchased during period	$ 127
May 2014 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)				$ 650
Stock repurchased during period (shares)	0	1,580,747
Stock repurchased during period	$ 0	$ 102