INVESTMENTS IN RELATED COMPANIES (Tables)

12 Months Ended

Dec. 31, 2017

Investments in Related Companies [Abstract]

Schedule of Cost Method Investments [Table Text Block]

Investments in Related Companies at Dec 31	Ownership Interest				Investment Balance
In millions	2017		2016		2017		2016
Dow International Holdings Company 1	12	%	15	%	$	633	$	633
Dow Quimica Argentina S.A. 2	—	%	23	%	—		—
Dow Quimica Mexicana S.A. de C.V.	15	%	15	%	5		5
Other	—	%	—	%	1		1
Total Investments in Related Companies					$	639	$	639

1. Ownership interest changed as a result of stock transfers and redemptions in Dow International Holdings Company by the parent company, Dow.

2. UCC transferred its shares in Dow Quimica Argentina S.A. ("DQA") to PBB Polisur S.R.L. and Dow Investment Argentina S.A., subsidiaries of Dow, in exchange for $2 million in cash and was included in "Sundry income (expense) - net" in the consolidated statements of income. In 2013, UCC's investment in DQA was fully impaired.