XML 137 R116.htm IDEA: XBRL DOCUMENT v3.22.0.1

Commitments and Contingencies - San Juan County Decommissioning Ordinance (Details) - Coal-Fired Electricity Generating Facility Demolition And Remediation Ordinance - San Juan Generating Station - Public Service Company of New Mexico - USD ($) $ in Millions	Nov. 09, 2021	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Initial funding requirement	$ 14.7
Surety bond		$ 46.0

X

- Definition

Loss Contingency, Surety Bond

+ References

No definition available.

+ Details

Name:	pnm_LossContingencySuretyBond
Namespace Prefix:	pnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Public Utilities, Initial Funding Requirement

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesInitialFundingRequirement
Namespace Prefix:	pnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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:	pnm_CommitmentsAndContingenciesRelatedToEnvironmentAndOtherNatureAxis=pnm_CoalFiredElectricityGeneratingFacilityDemolitionAndRemediationOrdinanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pnm_JointlyOwnedGeneratingFacilitiesAxis=pnm_SanJuanGeneratingStationMember
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: