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Goodwill (Notes)
3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill Goodwill
The gross carrying amounts and changes in the carrying amount of goodwill for the three months ended March 31, 2021 were as follows:
Vinyls SegmentOlefins SegmentTotal
Balances at December 31, 2020$1,053 $30 $1,083 
Effects of changes in foreign exchange rates(1)— (1)
Balances at March 31, 2021$1,052 $30 $1,082