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Jointly-owned Plant (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Jointly-owned Plant [Abstract] |
Accrued Capping, Closure, Post-closure and Environmental Costs | $ 13

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- Definition Jointly-owned Plant [Abstract] + References No definition available. + Details
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Namespace Prefix: | por_
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Balance Type: | na
Period Type: | duration

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- Definition The amount of estimated costs accrued as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility (such as a landfill or waste treatment facility). Represents the portion that will be paid within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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