EARNINGS PER SHARE CALCULATIONS (Earnings Per Share Calculation - Basic) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share [Abstract]
Net income attributable to The Dow Chemical Company, basic	$ 1.30		$ 0.88
Preferred stock dividends, basic	$ (0.07)		$ (0.07)
Distributed And Undistributed Earnings Allocated to Participating Securities Per Basic Share	$ (0.01)	[1]	$ (0.01)	[1]
Net income attributable to common stockholders, basic	$ 1.22		$ 0.80

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