DIVESTITURES (Divestiture of Ownership Interest in Dow Kokam LLC) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				1 Months Ended	11 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012	Nov. 30, 2013	Nov. 21, 2013	Nov. 22, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of Long-term Debt	$ 747	$ 4,272		$ 3,988
Dow Kokam LLC [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of Long-term Debt					75
Notes Receivable, Fair Value Disclosure							75
Notes, Loans and Financing Receivable, Net, Noncurrent	61
Dow Kokam LLC [Member] | Corporate Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of Stock, Percentage of Ownership before Transaction						67.40%
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 0	$ 26	[1]	$ 0	$ 26

[1] See Note 5 for additional information.