XML 152 R129.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory and Rate Matters - Four Corners Abandonment Application (Details) - Four Corners - PNM - USD ($) $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 08, 2021 | Nov. 01, 2020 | Nov. 30, 2020 | Dec. 31, 2023
Public Utilities, General Disclosures [Line Items] |  |  |  |
Payments for relief from obligations |  | $ 75.0 | $ 15.0 |
Final payment for relief from obligations |  |  | $ 60.0 |
Request issuance of energy transition bonds | $ 300.0 |  |  |
Forecasted undepreciated investment | 272.0 |  |  |
Plant decommissioning and coal mine reclamation costs | 4.6 |  |  |
Upfront financing costs | 7.3 |  |  |
Proceeds from securitization bonds | $ 16.5 |  |  |
Regulatory disallowance |  |  |  | $ 3.7
PNM |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |
Ownership percentage by noncontrolling owners |  | 13.00% |  |

X
- Definition Final Payment For Relief From Obligations + References No definition available. + Details
Name: | pnm_FinalPaymentForReliefFromObligations
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payments For Relief From Obligations + References No definition available. + Details
Name: | pnm_PaymentsForReliefFromObligations
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Proceeds From Securitization Bonds + References No definition available. + Details
Name: | pnm_ProceedsFromSecuritizationBonds
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, forecasted undepreciated investment + References No definition available. + Details
Name: | pnm_PublicUtilitiesForecastedUndepreciatedInvestment
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Public Utilities, Plant Decommissioning And Coal Mine Reclamation Costs + References No definition available. + Details
Name: | pnm_PublicUtilitiesPlantDecommissioningAndCoalMineReclamationCosts
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Public Utilities, Request Issuance Of Energy Transition Bonds + References No definition available. + Details
Name: | pnm_PublicUtilitiesRequestIssuanceOfEnergyTransitionBonds
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Upfront Financing Costs + References No definition available. + Details
Name: | pnm_PublicUtilitiesUpfrontFinancingCosts
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Disallowance + References No definition available. + Details
Name: | pnm_RegulatoryDisallowance
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=pnm_FourCornersMember
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: | srt_OwnershipAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |