SHAREHOLDER'S EQUITY, COMMON STOCK REPURCHASE (DETAILS) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	May 01, 2014	Sep. 01, 2012	Feb. 01, 2012	Jun. 01, 2011
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase (in shares)	7,316,731	4,984,186	3,371,902
Common stock repurchase	$ 348	$ 159	$ 60
2014 $650 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount				650
Common stock repurchase (in shares)	5,497,427
Common stock repurchase	265
2012 $250 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount					250
Common stock repurchase (in shares)	1,819,304	4,984,186	405,020
Common stock repurchase	83	159	8
2012 $50 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount						50
Common stock repurchase (in shares)			2,874,202
Common stock repurchase			50
2011 $50 million Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount							50
Common stock repurchase (in shares)			92,680
Common stock repurchase			$ 2