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Description of Business and Significant Accounting Policies (Schedule Of Estimated Useful Lives Of Assets) (Details) | Dec. 31, 2025
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Buildings and improvements |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life (in years) | 40 years
Plant and equipment |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life (in years) | 25 years
Ethylene pipeline |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life (in years) | 35 years
Other | Minimum |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life (in years) | 3 years
Other | Maximum |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful life (in years) | 15 years

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- 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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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