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Regulatory and Rate Matters - 2026 Resource Application (Narrative) (Details) - PNM	Oct. 25, 2023 MW batteryStorageAgreement
Public Utilities, General Disclosures [Line Items]
Number of battery storage agreements | batteryStorageAgreement	3
Solar Agreement
Public Utilities, General Disclosures [Line Items]
Number of megawatts available in purchase power agreement (in megawatts)	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
Solar Agreement Two
Public Utilities, General Disclosures [Line Items]
Number of megawatts available in purchase power agreement (in megawatts)	60

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