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Regulatory and Rate Matters - Transportation and Electrification Program (TEP) (Details) - PNM - USD ($) $ in Millions | Feb. 22, 2024 | Jun. 01, 2023
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Public Utilities, General Disclosures [Line Items] |  |
Expected budgeted expenditures |  | $ 37.1
Budget period |  | 3 years
Budge dedication to low-income customers |  | 22.00%
Budget dedication to low-income customers |  | $ 8.0
Subsequent Event |  |
Public Utilities, General Disclosures [Line Items] |  |
Expected budgeted expenditures | $ 4.0 |
Budget period | 3 years |

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