FINANCIAL INSTRUMENTS (Investments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financial Instruments [Abstact]
Investing Results, Proceeds from sales of available-for-sale securities			$ 352	$ 236
Investing Results, Gross realized gains			56	9
Investing Results, Gross realized losses			(11)	(5)
Contractual Maturities of Debt Securities, Within one year, Amortized Cost	32		32
Contractual Maturities of Debt Securities, One to five years, Amortized Cost	416		416
Contractual Maturities of Debt Securities, Six to ten years, Amortized Cost	567		567
Contractual Maturities of Debt Securities, After ten years, Amortized Cost	150		150
Contractual Maturities of Debt Securities, Total, Amortized Cost	1,165		1,165
Contractual Maturities of Debt Securities, Within one year, Fair Value	32		32
Contractual Maturities of Debt Securities, One to five years, Fair Value	450		450
Contractual Maturities of Debt Securities, Six to ten years, Fair Value	584		584
Contractual Maturities of Debt Securities, After ten years, Fair Value	170		170
Contractual Maturities of Debt Securities, Total, Fair Value	1,236		1,236
Held-to-maturity securities	1,875		1,875		1,701
Investments in money market funds	248		248		252
Net unrealized loss recognized on trading securities	$ (8)	$ 4	$ (10)	$ 2