Commitments and Contingencies - Texas Winter Storm (Details) - Texas-New Mexico Power Company $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($) lawsuit	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Regulatory asset, allowance for credit loss \| $	$ 0.8	$ 0.8
Number of law suits \| lawsuit	2

The total number of new claims filed pertaining to a loss contingency during the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration