Fair Value of Derivative and Other Financial Instruments - Schedule of Commodity Contract Volume Positions (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 MMBTU	Mar. 31, 2024 MWh	Dec. 31, 2023 MMBTU	Dec. 31, 2023 MWh
Commodity derivatives | Designated as Hedging Instrument | Public Service Company of New Mexico
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Economic Hedges (in mmtbu and mwh)	0	(15,360)	0	(15,360)