FINANCIAL INSTRUMENTS (Investments) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financial Instruments [Line Items]
Investing Results, Proceeds from sales of available-for-sale securities		$ 418	$ 279
Investing Results, Gross realized gains		34	39
Investing Results, Gross realized losses		(2)	(5)
Contractual Maturities of Debt Securities, Within one year, Amortized Cost		30
Contractual Maturities of Debt Securities, One to five years, Amortized Cost		332
Contractual Maturities of Debt Securities, Six to ten years, Amortized Cost		645
Contractual Maturities of Debt Securities, After ten years, Amortized Cost		215
Contractual Maturities of Debt Securities, Total, Amortized Cost		1,222
Contractual Maturities of Debt Securities, Within one year, Fair Value		30
Contractual Maturities of Debt Securities, One to five years, Fair Value		346
Contractual Maturities of Debt Securities, Six to ten years, Fair Value		681
Contractual Maturities of Debt Securities, After ten years, Fair Value		246
Contractual Maturities of Debt Securities, Total, Fair Value		1,303
Held-to-maturity securities		850		$ 3,354
Investments in money market funds		305		1,689
Cost method investments, aggregate cost		110		$ 157
Cost method investments, reduction in cost basis due to impairment		$ 0	$ 1
impairment of Long-Lived Assets, Other Investments and Other Assets [Member] | Corporate Segment [Member] | Write Down of Cost Method Investment [Member]
Financial Instruments [Line Items]
Other Asset Impairment Charges	$ 4