EARNINGS PER SHARE CALCULATIONS (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Net Income [Table Text Block]

Net Income for Earnings Per Share Calculations - Diluted	Three Months Ended						Six Months Ended
In millions	Jun 30, 2013			Jun 30, 2012			Jun 30, 2013			Jun 30, 2012
Net income attributable to The Dow Chemical Company	$	2,425		$	734		$	3,060		$	1,231
Preferred stock dividends (2)	—			(85		)	—			(170		)
Net income attributable to participating securities (1)	(20		)	(6		)	(25		)	(10		)
Net income attributable to common stockholders	$	2,405		$	643		$	3,035		$	1,051

Net Income for Earnings Per Share Calculations - Basic	Three Months Ended						Six Months Ended
In millions	Jun 30, 2013			Jun 30, 2012			Jun 30, 2013			Jun 30, 2012
Net income	$	2,443		$	740		$	3,103		$	1,260
Net income attributable to noncontrolling interests	(18		)	(6		)	(43		)	(29		)
Net income attributable to The Dow Chemical Company	$	2,425		$	734		$	3,060		$	1,231
Preferred stock dividends	(85		)	(85		)	(170		)	(170		)
Net income attributable to participating securities (1)	(20		)	(6		)	(25		)	(10		)
Net income attributable to common stockholders	$	2,320		$	643		$	2,865		$	1,051

Earnings Per Share Calculation - Basic

Earnings Per Share Calculations - Basic	Three Months Ended						Six Months Ended
Dollars per share	Jun 30, 2013			Jun 30, 2012			Jun 30, 2013			Jun 30, 2012
Net income	$	2.06		$	0.63		$	2.62		$	1.08
Net income attributable to noncontrolling interests	(0.01		)	—			(0.04		)	(0.02		)
Net income attributable to The Dow Chemical Company	$	2.05		$	0.63		$	2.58		$	1.06
Preferred stock dividends	(0.07		)	(0.07		)	(0.14		)	(0.15		)
Net income attributable to participating securities (1)	(0.02		)	(0.01		)	(0.02		)	(0.01		)
Net income attributable to common stockholders	$	1.96		$	0.55		$	2.42		$	0.90

Earnings Per Share Calculation - Diluted

Earnings Per Share Calculations - Diluted	Three Months Ended						Six Months Ended
Dollars per share	Jun 30, 2013			Jun 30, 2012			Jun 30, 2013			Jun 30, 2012
Net income	$	1.90		$	0.63		$	2.41		$	1.07
Net income attributable to noncontrolling interests	(0.01		)	—			(0.03		)	(0.02		)
Net income attributable to The Dow Chemical Company	$	1.89		$	0.63		$	2.38		$	1.05
Preferred stock dividends (2)	—			(0.07		)	—			(0.14		)
Net income attributable to participating securities (1)	(0.02		)	(0.01		)	(0.02		)	(0.01		)
Net income attributable to common stockholders	$	1.87		$	0.55		$	2.36		$	0.90

Schedule of Weighted Average Number of Shares [Table Text Block]

Additional Share Count Information	Three Months Ended		Six Months Ended
Shares in millions	Jun 30, 2013	Jun 30, 2012	Jun 30, 2013	Jun 30, 2012
Weighted-average common shares - basic	1,186.1	1,169.7	1,183.6	1,165.3
Plus dilutive effect of stock options and awards	5.3	6.9	5.9	7.4
Plus dilutive effect of assumed conversion of preferred stock (1)	96.8	—	96.8	—
Weighted-average common shares - diluted	1,288.2	1,176.6	1,286.3	1,172.7
Stock options and deferred stock awards excluded from EPS calculations (2)	69.0	54.4	65.1	51.3

(1) Conversion of the Cumulative Convertible Perpetual Preferred Stock, Series A into shares of the Company’s common stock was excluded from the calculation of diluted earnings per share for the three- and six-month periods ended June 30, 2012 because the effect of including them would have been antidilutive.

(2) These outstanding options to purchase shares of common stock and deferred stock awards were excluded from the calculation of diluted earnings per share because the effect of including them would have been antidilutive.