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Fair Value of Derivative and Other Financial Instruments - Schedule of Net Buy (Sell) Volume Positions (Details)	12 Months Ended
	Dec. 31, 2024 MMBTU	Dec. 31, 2024 MWh	Dec. 31, 2023 MMBTU	Dec. 31, 2023 MWh
Commodity Contract | Designated as Hedging Instrument | PNM
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Economic Hedges (in mmbtu and mwh)	0	89,900	0	(15,360)

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- Definition

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- Definition

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