DIVESTITURES (Divestiture of a Portion of Dow AgroSciences' Brazil Corn Seed Business) (Details) - Dow AgroSciences' Corn Seed Business [Member] - Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration				$ 1,093
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 635	$ 0	$ 0
Cash and cash equivalents				22
Accounts and notes receivable - trade and other				59
Inventories				139
Net property				70
Goodwill				128
Noncurrent receivables, deferred charges and other assets				102
Total assets divested				520
Current liabilities				39
Long-Term Debt and other noncurrent liabilities				23
Total liabilities divested				62
Net carrying value divested				$ 458