OPERATING SEGMENTS AND GEOGRAPHIC AREAS (Schedule of Operating Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]
Sales to external customers	$ 14,917		$ 14,577		$ 29,378		$ 28,960
Earnings before interest, taxes, depreciation and amortization	2,224	[1]	4,166	[1]	4,620	[1]	6,386	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	227		228		478		458
Electronic And Functional Materials [Member]
Segment Reporting Information [Line Items]
Sales to external customers	1,205		1,152		2,338		2,293
Earnings before interest, taxes, depreciation and amortization	303	[1]	254	[1]	593	[1]	527	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	22		28		53		45
Coatings and Infrastructure Solutions [Member]
Segment Reporting Information [Line Items]
Sales to external customers	1,951		1,888		3,700		3,555
Earnings before interest, taxes, depreciation and amortization	257	[1]	250	[1]	481	[1]	436	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	43		25		114		51
Agricultural Sciences [Member]
Segment Reporting Information [Line Items]
Sales to external customers	1,907		1,850		4,026		3,953
Earnings before interest, taxes, depreciation and amortization	281	[1]	290	[1]	810	[1]	774	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	2		1		2		3
Performance Materials [Member]
Segment Reporting Information [Line Items]
Sales to external customers	3,440		3,389		6,731		6,717
Earnings before interest, taxes, depreciation and amortization	386	[1]	284	[1]	826	[1]	724	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	(30)		(12)		(54)		(35)
Performance Plastics [Member]
Segment Reporting Information [Line Items]
Sales to external customers	3,746		3,676		7,359		7,174
Earnings before interest, taxes, depreciation and amortization	1,067	[1]	1,010	[1]	2,067	[1]	1,962	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	71		88		132		145
Feedstocks and Energy [Member]
Segment Reporting Information [Line Items]
Sales to external customers	2,595		2,543		5,053		5,099
Earnings before interest, taxes, depreciation and amortization	190	[1]	193	[1]	363	[1]	433	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	125		105		246		264
Corporate [Member]
Segment Reporting Information [Line Items]
Sales to external customers	73		79		171		169
Earnings before interest, taxes, depreciation and amortization	(260)	[1]	1,885	[1]	(520)	[1]	1,530	[1]
Equity in earnings (losses) of nonconsolidated affiliates by operating segment (included in EBITDA)	$ (6)		$ (7)		$ (15)		$ (15)

[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.