XML 144 R123.htm IDEA: XBRL DOCUMENT v3.22.0.1

Regulatory and Rate Matters - Integrated Resource Plans and Abandonment Applications (Details)		12 Months Ended
	Jan. 29, 2021	Dec. 31, 2021
NMPRC
Public Utilities, General Disclosures [Line Items]
Period of action plan		4 years
Public Service Company of New Mexico
Public Utilities, General Disclosures [Line Items]
Required filing of Integrated Resource Plan		3 years
Integrated Resource Plan, 2011 | Public Service Company of New Mexico
Public Utilities, General Disclosures [Line Items]
Planning period covered, IRP		20 years
Integrated Resource Plan, 2020 | Public Service Company of New Mexico
Public Utilities, General Disclosures [Line Items]
Planning period covered, IRP	20 years

X

- Definition

Public Utilities, Frequency of IRP filings

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesFrequencyofIRPfilings
Namespace Prefix:	pnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Public Utilities, Integrated Resource Plan, Action Plan, Period

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesIntegratedResourcePlanActionPlanPeriod
Namespace Prefix:	pnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Public Utilities, Planning Period Covered of IRP

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesPlanningPeriodCoveredOfIrp
Namespace Prefix:	pnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
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:	us-gaap_RegulatoryAgencyAxis=pnm_NMPRCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

Name:	pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_IntegratedResourcePlan2011Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_IntegratedResourcePlan2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: