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Lease Commitments - Schedule of Weighted Average Remaining Lease Terms and Discount Rates (Details)	Mar. 31, 2023
Weighted average remaining lease term (years):
Operating leases	7 years 5 months 12 days
Financing leases	3 years 7 months 9 days
Weighted average discount rate:
Operating leases	4.08%
Financing leases	3.85%
PNM
Weighted average remaining lease term (years):
Operating leases	7 years 9 months 7 days
Financing leases	3 years 11 months 12 days
Weighted average discount rate:
Operating leases	4.08%
Financing leases	3.90%
TNMP
Weighted average remaining lease term (years):
Operating leases	2 years 25 days
Financing leases	3 years 3 months 3 days
Weighted average discount rate:
Operating leases	4.06%
Financing leases	3.80%

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Weighted average discount rate for finance lease calculated at point in time.

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-Publisher FASB
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-SubTopic 20
-Section 50
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-Publisher FASB
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-URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

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