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Lease Commitments - Schedule of Weighted Average Remaining Lease Terms and Discount Rates (Details)	Jun. 30, 2022
Weighted average remaining lease term (years):
Operating leases	5 years 7 months 17 days
Financing leases	3 years 11 months 23 days
Weighted average discount rate:
Operating leases	4.01%
Financing leases	2.94%
PNM
Weighted average remaining lease term (years):
Operating leases	5 years 9 months 21 days
Financing leases	4 years 2 months 19 days
Weighted average discount rate:
Operating leases	4.01%
Financing leases	2.91%
TNMP
Weighted average remaining lease term (years):
Operating leases	2 years 7 months 9 days
Financing leases	3 years 9 months 7 days
Weighted average discount rate:
Operating leases	4.01%
Financing leases	2.98%

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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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-Name Accounting Standards Codification
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-URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

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