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RELATED PARTY TRANSACTIONS (Tables)
 6 Months Ended
Jun. 30, 2021
Related Party Transactions [Abstract]  
Dividends Declared The following table summarizes cash dividends TDCC declared and paid to Dow Inc. for the three and six months ended June 30, 2021 and 2020:
Cash Dividends Declared and PaidThree Months EndedSix Months Ended
Jun 30, 2021Jun 30, 2020Jun 30, 2021Jun 30, 2020
In millions
Cash dividends declared and paid$739 $529 $1,442 $1,172