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Electric Operating Revenues - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Jan. 01, 2019
Disaggregation of Revenue [Line Items] |  |  |
Other receivables, allowance for credit loss | $ 0 | $ 0 |
Capitalized contract cost, amortization period |  |  | 5 years
Contract assets | 32,000,000 | 22,100,000 |
PNM |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract with customers, net | $ 94,300,000 | $ 93,600,000 |

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- Definition Amortization period of cost capitalized in obtaining or fulfilling contract with customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -SubTopic 40 -Topic 340 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479483/340-40-50-2 + Details
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