SUPPLEMENTARY INFORMATION (Sundry Income, Net) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Supplementary Information [Line Items]
Total sundry income (expense) - net		$ 2	$ (30)		$ 14
Nonmonetary Transaction, Gain (Loss) Recognized on Transfer		0	23		0
Net gain on sales of property		50	(3)		4
Reclassification of cumulative translation adjustment		0	0		(16)
Foreign exchange loss		1	(2)		0
Other Operating Income		0
Other Cost and Expense, Operating			(6)		(9)
Administrative and overhead fees [Member] | The Dow Chemical Company [Member]
Supplementary Information [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	[1]	(27)	(30)		(26)
Net Commission Expense [Member]
Supplementary Information [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	[1]	(22)	(22)		(21)
Dividend Income [Member]
Supplementary Information [Line Items]
Dividend income - related company	[1]	0	0		12
Polypropylene Licensing and Catalyst Business [Member]
Supplementary Information [Line Items]
Net gain on sale of Dow's Polypropylene Licensing and Catalysts business	[2]	0	0		4
Property, Plant and Equipment [Member]
Supplementary Information [Line Items]
Net gain on sale of assets		0	0		66	[1]
Patents [Member]
Supplementary Information [Line Items]
Net gain on sale of assets		$ 0	$ 10	[2]	$ 0

[1] See Note 17 for additional information.

[2] See Note 4 for additional information.