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Fair Value of Derivative and Other Financial Instruments - Schedule of Available-for-Sale Debt Securities Held By PNM (Details) - PNMR and PNM $ in Thousands	Dec. 31, 2024 USD ($)
Available-for-Sale
Within 1 year	$ 24,446
After 1 year through 5 years	7,898
Fair Value	$ 32,344

X

- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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