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EARNINGS PER SHARE CALCULATIONS (Net Income) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings Per Share [Abstract]      
Net Income Attributable to The Dow Chemical Company $ 3,772us-gaap_NetIncomeLoss $ 4,787us-gaap_NetIncomeLoss $ 1,182us-gaap_NetIncomeLoss
Preferred stock dividends 340us-gaap_DividendsPreferredStock [1] 340us-gaap_DividendsPreferredStock 340us-gaap_DividendsPreferredStock [1]
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic (27)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [2] (38)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [2] (13)us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic [2]
Net income attributable to common stockholders $ 3,405dow_NetIncomeAttributableToCommonStockholders $ 4,409dow_NetIncomeAttributableToCommonStockholders $ 829dow_NetIncomeAttributableToCommonStockholders
[1] Preferred stock dividends were not added back in the calculation of diluted earnings per share for the periods ended December 31, 2014 and December 31, 2012 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.