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Regulatory and Rate Matters - Integrated Resource Plan (Details) - meeting |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
May 04, 2016 | Jul. 01, 2014 | Dec. 31, 2017 | Jun. 30, 2016
NMPRC |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Period of action plan |  |  | 4 years |
Public Service Company of New Mexico |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Required filing of Integrated Resource Plan |  |  | 3 years |
Planning period covered, IRP |  |  | 20 years |
Period of action plan |  |  | 4 years |
Number of statewide meetings |  |  |  | 17
Public Service Company of New Mexico | NMPRC |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Period of action plan |  | 4 years |  |
Period of time to show good cause why a docket should remain open | 30 days |  |  |

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