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RELATED PARTY TRANSACTIONS
 9 Months Ended
Sep. 30, 2021
Related Party Transactions [Abstract]  
RELATED PARTY TRANSACTIONS DISCLOSURE RELATED PARTY TRANSACTIONS
A summary of the Corporation's related party transactions can be found in Note 19 to the Consolidated Financial Statements included in the 2020 10-K.

Product and Services Agreements
The following table summarizes UCC’s transactions with TDCC and a TDCC subsidiary related to product and services agreements for the three and nine months ended September 30, 2021 and 2020:

Product and Services Agreements TransactionsThree Months EndedNine Months Ended
Sep 30, 2021Sep 30, 2020Sep 30, 2021Sep 30, 2020Income Statement Classification
In millions
TDCC Subsidiary:
Commodity and raw materials purchases 1
$382 $270 $1,360 $707 Cost of sales
Commission expense$4 $5 $16 $16 Sundry income (expense) - net
TDCC:
General administrative and overhead type services
and service fee 2
$12 $7 $47 $23 Sundry income (expense) - net
Activity-based costs$18 $19 $55 $66 Cost of sales
1.Period-end balances on hand are included in inventory. The increase in purchase costs was primarily due to higher feedstock and energy costs, which includes the impact of Winter Storm Uri in the first quarter of 2021.
2.The increase in services and fees resulted from TDCC's periodic review of the actual cost of services provided to UCC in accordance with related agreements.

Dividends
The following table summarizes cash dividends declared and paid to TDCC for the three and nine months ended September 30, 2021 and 2020:

Cash Dividends Declared and PaidThree Months EndedNine Months Ended
Sep 30, 2021Sep 30, 2020Sep 30, 2021Sep 30, 2020
In millions
Cash dividends declared and paid$78 $25 $118 $187