EARNINGS PER SHARE CALCULATIONS (Net Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share [Abstract]
Net Income Attributable to The Dow Chemical Company	$ 1,478		$ 1,049
Preferred stock dividends	(85)		(85)	[1]
Net income attributable to participating securities	(10)	[2]	(8)	[2]
Net income attributable to common stockholders	1,383		956
Net income attributable to participating securities, Diluted	(10)	[2]	(8)	[2]
Net income attributable to common stockholders, Diluted	$ 1,468		$ 956

[1] Preferred stock dividends were not added back in the calculation of diluted earnings per share for the three-month period ended March 31, 2014, because the effect of adding them back would have been antidilutive.

[2] Deferred stock awards are considered participating securities due to Dow's practice of paying dividend equivalents on unvested shares.