FINANCIAL INSTRUMENTS (Investments) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Financial Instruments [Line Items]
Investing Results, Proceeds from sales of available-for-sale securities		$ 383	$ 331
Investing Results, Gross realized gains		48	23
Investing Results, Gross realized losses		1	1
Contractual Maturities of Debt Securities, Within one year, Amortized Cost		10
Contractual Maturities of Debt Securities, One to five years, Amortized Cost		329
Contractual Maturities of Debt Securities, Six to ten years, Amortized Cost		656
Contractual Maturities of Debt Securities, After ten years, Amortized Cost		225
Contractual Maturities of Debt Securities, Total, Amortized Cost		1,220
Contractual Maturities of Debt Securities, Within one year, Fair Value		10
Contractual Maturities of Debt Securities, One to five years, Fair Value		338
Contractual Maturities of Debt Securities, Six to ten years, Fair Value		663
Contractual Maturities of Debt Securities, After ten years, Fair Value		243
Contractual Maturities of Debt Securities, Total, Fair Value		1,254
Held-to-maturity securities		309		$ 261
Investments in money market funds		850		239
Cost method investments, aggregate cost		116		$ 120
Cost-method Investments, Other than Temporary Impairment		$ 0	$ 0
Impairment of long-lived assets, other investments and other assets [Member] | Write down of cost method investment [Member] | Corporate Segment [Member]
Financial Instruments [Line Items]
Other Asset Impairment Charges	$ 4