XML 143 R121.htm IDEA: XBRL DOCUMENT v3.22.4

Regulatory and Rate Matters - Renewable Energy Rider (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Public Service Company of New Mexico | Renewable energy rider, including excess return | NMPRC
Public Utilities, General Disclosures [Line Items]
Revenue from renewable energy rider	$ 60.3	$ 61.7	$ 56.4

X

- Definition

Public Utilities, Revenue from Renewable energy rider

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesRevenuefromRenewableenergyrider
Namespace Prefix:	pnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_RenewableEnergyRiderMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RegulatoryAgencyAxis=pnm_NMPRCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: