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SHAREHOLDERS' EQUITY SHAREHOLDERS' EQUITY, COMMON STOCK REPURCHASE (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012 September 2012 Stock Repurchase Program [Member]	Mar. 31, 2013 September 2012 Stock Repurchase Program [Member]	Mar. 31, 2012 September 2012 Stock Repurchase Program [Member]	Feb. 29, 2012 February 2012 Stock Repurchase Program [Member]	Mar. 31, 2013 February 2012 Stock Repurchase Program [Member]	Mar. 31, 2012 February 2012 Stock Repurchase Program [Member]	Jun. 30, 2011 June 2011 Stock Repurchase Program [Member]	Mar. 31, 2013 June 2011 Stock Repurchase Program [Member]	Mar. 31, 2012 June 2011 Stock Repurchase Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 250			$ 50			$ 50
Stock Repurchased During Period, Shares	373,185	249,340		373,185	0		0	203,000		0	46,340
Stock Repurchased During Period, Value	$ 19	$ 9		$ 19	$ 0		$ 0	$ 7		$ 0	$ 2

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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