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Financing - Schedule of Short-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Short-term debt	$ 266,300	$ 62,700
PNM
Short-term Debt [Line Items]
Short-term debt	110,800	7,400
Texas-New Mexico Power Company
Short-term Debt [Line Items]
Short-term debt	100,000	400
PNM Revolving Credit Facility | PNM
Short-term Debt [Line Items]
Short-term debt	70,800	7,400
PNM 2017 New Mexico Credit Facility | PNM
Short-term Debt [Line Items]
Short-term debt	40,000	0
TNMP Revolving Credit Facility | Texas-New Mexico Power Company
Short-term Debt [Line Items]
Short-term debt	100,000	400
PNMR Revolving Credit Facility
Short-term Debt [Line Items]
Short-term debt	$ 55,500	$ 54,900

X

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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