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Regulatory and Rate Matters - 2025 Rate Request (Narrative) (Details) - 2025 Rate Request - USD ($) $ in Millions | Nov. 26, 2024 | Jun. 14, 2024
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Public Utilities, General Disclosures [Line Items] |  |
Requested return on equity | 9.45% | 10.45%
Requested equity capital structure, percentage | 51.00% | 52.50%
PNM |  |
Public Utilities, General Disclosures [Line Items] |  |
Recovery of base rate |  | $ 3,000.0
Requested rate increase (decrease) | $ 105.0 | 174.3
Increase in base rate | $ 82.1 | 92.2
Increase in revenues from FPPAC |  | $ 82.1

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