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Regulatory and Rate Matters - FERC Compliance (Details) - Public Service Company of New Mexico $ in Millions	Jun. 16, 2022 USD ($)
Public Utilities, General Disclosures [Line Items]
Compliance extension period	75 days
Compliance extension period, repost period	30 days
FERC Proceedings One
Public Utilities, General Disclosures [Line Items]
Time-value customer refund	$ 7.0
FERC Proceedings Two
Public Utilities, General Disclosures [Line Items]
Time-value customer refund	$ 28.0

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