Regulatory and Rate Matters - PVNGS Leased Interest Abandonment Application (Details)						6 Months Ended	12 Months Ended
	Dec. 05, 2022 MW	Sep. 08, 2022	Aug. 23, 2022	Apr. 02, 2021 lease MW	Nov. 15, 2015 power_purchase_agreement numberOfAMIMeter batteryStorageAgreement	Dec. 31, 2021 power_purchase_agreement	Dec. 31, 2021 power_purchase_agreement	Oct. 14, 2022 MW	Sep. 02, 2022 MW	Feb. 14, 2022 MW	Jul. 29, 2020 MW
Public Utilities, General Disclosures [Line Items]
Regulatory time frame for proposed PPAs and battery storage agreements				6 months
Number of purchase power agreements | power_purchase_agreement						3
Public Service Company of New Mexico
Public Utilities, General Disclosures [Line Items]
Number of leases under which lease term was extended | lease				5
Solar distributed generation (in mw)								200			650
Number of purchase power agreements | power_purchase_agreement					2		3
Number of battery storage agreements | batteryStorageAgreement					3
Number of megawatts in battery storage facilities (in megawatts)								100			300
Total number of agreements | numberOfAMIMeter					5
Filing period, extension		2 days	45 days
Filing period, with extension		12 days
Public Service Company of New Mexico | NM 2022 Rate Case
Public Utilities, General Disclosures [Line Items]
Megawatt repurchase (in megawatts)	64.1
Public Service Company of New Mexico | Leased Interest Termination On January 15, 2023
Public Utilities, General Disclosures [Line Items]
Number of leases under which lease term was extended | lease				4
Public Service Company of New Mexico | Replacement Resource Portfolio One
Public Utilities, General Disclosures [Line Items]
Solar distributed generation (in mw)				150						150
Number of megawatts in battery storage facilities (in megawatts)				40						40
Public Service Company of New Mexico | Replacement Resource Portfolio Two
Public Utilities, General Disclosures [Line Items]
Number of megawatts in battery storage facilities (in megawatts)				100						100
Public Service Company of New Mexico | Replacement Resource Portfolio Three
Public Utilities, General Disclosures [Line Items]
Solar distributed generation (in mw)				300						300
Number of megawatts in battery storage facilities (in megawatts)				150					300	150
NMPRC | Public Service Company of New Mexico | Leased Interest Termination On January 15, 2023
Public Utilities, General Disclosures [Line Items]
Solar distributed generation (in mw)				104
NMPRC | Public Service Company of New Mexico | Leased Interest Termination On January 15, 2024
Public Utilities, General Disclosures [Line Items]
Solar distributed generation (in mw)				10