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INVESTMENTS IN RELATED COMPANIES (Tables)
 12 Months Ended
Dec. 31, 2018
Investments in Related Companies [Abstract]  
Schedule of Cost Method Investments
The Corporation's ownership interests in related companies at December 31, 2018 and 2017 were as follows:

Investments in Related Companies at Dec 31
Ownership Interest
Investment Balance
In millions
2018
2017
2018
2017
Dow International Holdings Company
12
%
12
%
$
633

$
633

Dow Quimica Mexicana S.A. de C.V.
15
%
15
%
5

5

Other
—
%
—
%
1

1

Total Investments in Related Companies
 
 
$
639

$
639