SUPPLEMENTARY INFORMATION (Sundry Income, Net) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended												1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2013 Contract Manufacturing Business [Member]		Dec. 31, 2012 Contract Manufacturing Business [Member]		Dec. 31, 2011 Contract Manufacturing Business [Member]		Dec. 31, 2013 Performance Plastics [Member] Polypropylene Licensing and Catalyst Busines [Member]	Dec. 31, 2013 Performance Plastics [Member] Polypropylene Licensing and Catalyst Busines [Member]	Dec. 31, 2012 Performance Plastics [Member] Polypropylene Licensing and Catalyst Busines [Member]	Dec. 31, 2011 Performance Plastics [Member] Polypropylene Licensing and Catalyst Busines [Member]	Nov. 30, 2013 Corporate Segment [Member] Dow Kokam LLC [Member]	Dec. 31, 2013 Corporate Segment [Member] Dow Kokam LLC [Member]		Dec. 31, 2012 Corporate Segment [Member] Dow Kokam LLC [Member]		Dec. 31, 2011 Corporate Segment [Member] Dow Kokam LLC [Member]		Dec. 31, 2013 Impact to Sundry income (expense) [Member] K-Dow Matter [Member] Positive Outcome of Litigation [Member] Corporate Segment [Member]		Dec. 31, 2012 Impact to Sundry income (expense) [Member] K-Dow Matter [Member] Positive Outcome of Litigation [Member] Corporate Segment [Member]		Dec. 31, 2011 Impact to Sundry income (expense) [Member] K-Dow Matter [Member] Positive Outcome of Litigation [Member] Corporate Segment [Member]		Dec. 31, 2013 Freeport LNG Development, L.P. [Member] Feedstocks and Energy [Member]	Dec. 31, 2012 Freeport LNG Development, L.P. [Member] Feedstocks and Energy [Member]	Dec. 31, 2011 Freeport LNG Development, L.P. [Member] Feedstocks and Energy [Member]
Supplementary Information [Line Items]
Total sundry income (expense) - net	$ 2,554		$ (27)		$ (316)
Gain on sales of other assets and securities	98	[1]	81	[1]	119	[1]
Foreign exchange loss	(31)		(51)		(53)
Dividend income	3		1		25
Recognized Gain in Current Period, Former Gain Contingency																								2,161	[2]	0	[2]	0	[2]
Gain (loss) on divestiture							0	[3]	8	[3]	(36)	[3]	451	451	0	0	26	26	[4]	0	[4]	0	[4]
Loss on early extinguishment of debt	(329)		(123)		(482)
Cost-method Investments, Realized Gain (Loss)																														87	0	0
Reclassification of cumulative translation adjustment	21	[5]	0	[5]	33	[5]					(6)	[2]
Gain on consolidation of joint venture	0		0		21
Other - net	$ 67		$ 57		$ 57

[1] The 2013 gain on sales of other assets and investments also included a $21 million gain reported as "Reclassification of cumulative translation adjustments."

[2] See Note 14 for additional information.

[3] The 2011 loss on the sale of a contract manufacturing business also included a $6 million loss reported as "Reclassification of cumulative translation adjustments."

[4] See Note 5 for additional information.

[5] Cumulative translation adjustments reclassified from "Accumulated other comprehensive income (loss)" into income resulted from transactions that qualified as a complete liquidation of an investment in a foreign entity.