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Regulatory and Rate Matters - 2026 Resource Application (Details) - PNM |  |  | 3 Months Ended
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Oct. 25, 2023 MW batteryStorageAgreement | Jan. 30, 2023 MW | Dec. 31, 2022 batteryStorageAgreement
Public Utilities, General Disclosures [Line Items] |  |  |
Number of battery storage agreements | batteryStorageAgreement | 3 |  | 2
Number of megawatts available in CCN | 60 |  |
Solar Agreement |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Number of megawatts available in purchase power agreement (in megawatts) | 100 | 100 |
Battery Storage Agreement One |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Number of megawatts available in purchase power agreement (in megawatts) | 100 |  |
Battery Storage Agreement Two |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Number of megawatts available in purchase power agreement (in megawatts) | 100 |  |
Battery Storage Agreement Three |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |
Number of megawatts available in purchase power agreement (in megawatts) | 50 |  |

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