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Regulatory and Rate Matters - Battery Energy Storage System Certificate of Public Convenience and Necessity ("CCN") (Details) - PNM $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
Oct. 25, 2023 batteryStorageAgreement | May 03, 2023 USD ($) MW | Dec. 31, 2022 batteryStorageAgreement
Public Utilities, General Disclosures [Line Items] |  |  |
Number of battery storage agreements | batteryStorageAgreement | 3 |  | 2
Battery energy storage systems (megawatts) | MW |  | 6 |
Battery energy storage system, costs | $ |  | $ 25.8 |

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- Details
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