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Equity Method Investment - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) MW
NMRD
Business Acquisition [Line Items]
Renewable energy capacity in operating (in mw) | MW	135.1
PNMR Development | NMRD
Business Acquisition [Line Items]
Contribution to construction activities | $	$ 14.8
PNMR Development | NMRD
Business Acquisition [Line Items]
Ownership	50.00%
AEP OnSite Partners | NMRD
Business Acquisition [Line Items]
Ownership	50.00%

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

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