XML 104 R85.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Commitments and Contingencies - San Juan County Decommissioning Ordinance (Details) - San Juan Generating Station - Coal-Fired Electricity Generating Facility Demolition And Remediation Ordinance - Public Service Company of New Mexico - USD ($) $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Nov. 09, 2021
Public Utilities, Commitments And Contingencies [Line Items] |  |  |
Initial funding requirement | $ 14.7 |  |
Surety bond |  |  | $ 46.0
Decrease in decommissioning obligation |  | $ 21.1 |

X
- Definition Loss Contingency, Decrease In Decommissioning Obligation + References No definition available. + Details
Name: | pnm_LossContingencyDecreaseInDecommissioningObligation
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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, Commitments And Contingencies [Line Items] + References No definition available. + Details
Name: | pnm_PublicUtilitiesCommitmentsAndContingenciesLineItems
Namespace Prefix: | pnm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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
- Details
Name: | pnm_JointlyOwnedGeneratingFacilitiesAxis=pnm_SanJuanGeneratingStationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_CommitmentsAndContingenciesRelatedToEnvironmentAndOtherNatureAxis=pnm_CoalFiredElectricityGeneratingFacilityDemolitionAndRemediationOrdinanceMember
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: |