FINANCIAL INSTRUMENTS (Investments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Financial Instruments [Line Items]
Investing Results, Proceeds from sales of available-for-sale securities	$ 208	$ 214
Investing Results, Gross realized gains	46	36
Investing Results, Gross realized losses	(1)	(9)
Contractual Maturities of Debt Securities, Within one year, Amortized Cost	10
Contractual Maturities of Debt Securities, One to five years, Amortized Cost	601
Contractual Maturities of Debt Securities, Six to ten years, Amortized Cost	451
Contractual Maturities of Debt Securities, After ten years, Amortized Cost	127
Contractual Maturities of Debt Securities, Total, Amortized Cost	1,189
Contractual Maturities of Debt Securities, Within one year, Fair Value	10
Contractual Maturities of Debt Securities, One to five years, Fair Value	635
Contractual Maturities of Debt Securities, Six to ten years, Fair Value	464
Contractual Maturities of Debt Securities, After ten years, Fair Value	148
Contractual Maturities of Debt Securities, Total, Fair Value	1,257
Held-to-maturity securities	1,250		1,581
Investments in money market funds	384		1,331
Cost method investments, aggregate cost	177		185
Cost method investments, reduction in cost basis due to impairment	$ 5	$ 0