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Goodwill and Other Intangible Assets (Narrative) (Details) - Measurement Input, Discount Rate [Member] - Valuation Technique, Discounted Cash Flow [Member]	Dec. 31, 2020
Olefins [Member]
Goodwill [Line Items]
Alternative Investment, Measurement Input	0.090
Vinyls [Member] | Minimum [Member]
Goodwill [Line Items]
Alternative Investment, Measurement Input	0.078
Vinyls [Member] | Maximum [Member]
Goodwill [Line Items]
Alternative Investment, Measurement Input	0.108

X

- Definition

Value of input used to measure alternative investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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X

- Definition

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.

+ References

No definition available.

+ Details

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