OPERATING SEGMENTS AND GEOGRAPHIC AREAS (Reconciliation of EBITDA to Income Before Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Reconciliation of EBITDA to Income Before Income Taxes [Abstract]
Earnings before interest, taxes, depreciation and amortization	$ 3,063	[1]	$ 2,396	[1]
Minus depreciation and amortization	634		672
Plus interest income	17		13
Minus interest expense and amortization of debt discount	241		246
Income Before Income Taxes	$ 2,205		$ 1,491

[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.