SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Aug. 31, 2015	May 31, 2014
Class of Stock [Line Items]
Stock repurchased during period (shares)	873,396	2,480,807	2,594,809	4,061,554
Stock repurchased during period	$ 67	$ 160	$ 193	$ 262
2015 1 Billion Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)					$ 1,000
Stock repurchased during period (shares)	873,396	0	2,594,809	0
Stock repurchased during period	$ 67	$ 0	$ 193	$ 0
May 2014 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)						$ 650
Stock repurchased during period (shares)	0	2,480,807	0	4,061,554
Stock repurchased during period	$ 0	$ 160	$ 0	$ 262