SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	May 31, 2014	Sep. 30, 2012
Class of Stock [Line Items]
Stock repurchased during period (shares)	1,580,747	705,702
Stock repurchased during period	$ 102	$ 30
May 2014 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)			650
Stock repurchased during period (shares)	1,580,747	0
Stock repurchased during period	102	0
September 2012 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount (shares)				250
Stock repurchased during period (shares)	0	705,702
Stock repurchased during period	$ 0	$ 30