SHAREHOLDER'S EQUITY, COMMON STOCK REPURCHASE (DETAILS) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 $250 million Repurchase Program [Member]	Dec. 31, 2012 $250 million Repurchase Program [Member]	Dec. 31, 2011 $250 million Repurchase Program [Member]	Dec. 31, 2010 $250 million Repurchase Program [Member]	Feb. 29, 2012 February 2012 Stock Repurchase Program [Member]	Dec. 31, 2012 February 2012 Stock Repurchase Program [Member]	Dec. 31, 2011 February 2012 Stock Repurchase Program [Member]	Dec. 31, 2010 February 2012 Stock Repurchase Program [Member]	Jun. 30, 2011 June 2011 Stock Repurchase Program [Member]	Dec. 31, 2012 June 2011 Stock Repurchase Program [Member]	Dec. 31, 2011 June 2011 Stock Repurchase Program [Member]	Dec. 31, 2010 June 2011 Stock Repurchase Program [Member]	Jun. 30, 2010 June 2010 Stock Repurchase Program [Member]	Dec. 31, 2012 June 2010 Stock Repurchase Program [Member]	Dec. 31, 2011 June 2010 Stock Repurchase Program [Member]	Dec. 31, 2010 June 2010 Stock Repurchase Program [Member]	Jun. 11, 2009 June 2009 Stock Repurchase Program [Member]	Dec. 31, 2012 June 2009 Stock Repurchase Program [Member]	Dec. 31, 2011 June 2009 Stock Repurchase Program [Member]	Dec. 31, 2010 June 2009 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount				$ 250				$ 50				$ 50				$ 50				$ 50
Common stock repurchase (in shares)	1,685,951	2,618,600	2,001,496		202,510	0	0		1,437,101	0	0		46,340	1,595,000	0		0	1,023,600	710,000		0	0	1,291,496
Common stock repurchase	$ 60	$ 79	$ 45		$ 8	$ 0	$ 0		$ 50	$ 0	$ 0		$ 2	$ 48	$ 0		$ 0	$ 31	$ 19		$ 0	$ 0	$ 26