FINANCIAL INSTRUMENTS (Investments) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financial Instruments [Line Items]
Investing Results, Proceeds from sales of available-for-sale securities		$ 331	$ 195
Investing Results, Gross realized gains		23	31
Investing Results, Gross realized losses		(1)	(2)
Contractual Maturities of Debt Securities, Within one year, Amortized Cost	$ 15	15
Contractual Maturities of Debt Securities, One to five years, Amortized Cost	314	314
Contractual Maturities of Debt Securities, Six to ten years, Amortized Cost	653	653
Contractual Maturities of Debt Securities, After ten years, Amortized Cost	261	261
Contractual Maturities of Debt Securities, Total, Amortized Cost	1,243	1,243
Contractual Maturities of Debt Securities, Within one year, Fair Value	15	15
Contractual Maturities of Debt Securities, One to five years, Fair Value	327	327
Contractual Maturities of Debt Securities, Six to ten years, Fair Value	696	696
Contractual Maturities of Debt Securities, After ten years, Fair Value	291	291
Contractual Maturities of Debt Securities, Total, Fair Value	1,329	1,329
Held-to-maturity securities	850	850		$ 3,354
Litigation Settlement, Amount		835	0
Investments in money market funds	249	249		1,689
Cost method investments, aggregate cost	151	151		$ 157
Cost method investments, reduction in cost basis due to impairment		0	$ 0
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
Urethane Antitrust Litigation [Domain] | Performance Materials & Chemicals [Member]
Financial Instruments [Line Items]
Litigation Settlement, Amount		$ 835