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Segment and Geographic Information (Total Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 13,835	$ 13,261
Operating Segments [Member] | Olefins [Member]
Segment Reporting Information [Line Items]
Total assets	1,923	1,991
Operating Segments [Member] | Vinyls [Member]
Segment Reporting Information [Line Items]
Total assets	10,680	10,597
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	$ 1,232	$ 673

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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