OPERATING SEGMENTS AND GEOGRAPHIC AREAS (Schedule of Operating Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Sales to external customers	$ 14,461		$ 14,383
Earnings before interest, taxes, depreciation and amortization	2,396	[1]	2,220	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	251		230
Electronic And Functional Materials [Member]
Segment Reporting Information [Line Items]
Sales to external customers	1,133		1,141
Earnings before interest, taxes, depreciation and amortization	290	[1]	273	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	31		17
Coatings and Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Sales to external customers	1,749		1,667
Earnings before interest, taxes, depreciation and amortization	224	[1]	186	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	71		26
Agricultural Sciences [Member]
Segment Reporting Information [Line Items]
Sales to external customers	2,119		2,103
Earnings before interest, taxes, depreciation and amortization	529	[1]	484	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	0		2
Performance Materials [Member]
Segment Reporting Information [Line Items]
Sales to external customers	3,291		3,328
Earnings before interest, taxes, depreciation and amortization	440	[1]	440	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	(24)		(23)
Performance Plastics [Member]
Segment Reporting Information [Line Items]
Sales to external customers	3,613		3,498
Earnings before interest, taxes, depreciation and amortization	1,000	[1]	952	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	61		57
Feedstocks and Energy [Member]
Segment Reporting Information [Line Items]
Sales to external customers	2,458		2,556
Earnings before interest, taxes, depreciation and amortization	173	[1]	240	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	121		159
Corporate [Member]
Segment Reporting Information [Line Items]
Sales to external customers	98		90
Earnings before interest, taxes, depreciation and amortization	(260)	[1]	(355)	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	$ (9)		$ (8)

[1] The Company uses EBITDA (which Dow defines as earnings (i.e., "Net Income") before interest, income taxes, depreciation and amortization) as its measure of profit/loss for segment reporting purposes. EBITDA by operating segment includes all operating items relating to the businesses; items that principally apply to the Company as a whole are assigned to Corporate. A reconciliation of EBITDA to "Income Before Income Taxes" is provided below.