XML 149 R126.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Regulatory and Rate Matters - Energy Efficiency and Load Management (Details) - PNM $ in Millions | Apr. 17, 2023 USD ($) program | Apr. 15, 2020 USD ($) MMBTU GWh program
--- | --- | ---
Energy Efficiency and Load Management Program |  |
Public Utilities, General Disclosures [Line Items] |  |
Number of programs | program | 10 | 12
Program costs related to energy efficiency, in year one | $ 34.5 | $ 31.4
Program costs related to energy efficiency, in year two | 35.4 | 31.0
Program costs related to energy efficiency, in year three | $ 36.5 | $ 29.6
2021 Energy Efficiency Annual Report | Disincentives and Incentives Added |  |
Public Utilities, General Disclosures [Line Items] |  |
Energy efficiency and load management programs targeted energy savings (in Gigawatts) | GWh |  | 94
Minimum | Renewable Portfolio Standard |  |
Public Utilities, General Disclosures [Line Items] |  |
Profit incentive sliding scale multiplier | 0.071 | 0.071
Energy efficiency and load management programs targeted energy savings (in Gigawatts) | MMBTU |  | 80
Maximum | Energy Efficiency and Load Management Program |  |
Public Utilities, General Disclosures [Line Items] |  |
Profit incentive sliding scale multiplier | 0.0882 |

X
- Definition Public Utilities, Energy Efficiency and Load Management Programs Targeted Energy Savings + References No definition available. + Details
Name: | pnm_PublicUtilitiesEnergyEfficiencyAndLoadManagementProgramsTargetedEnergySavings
Namespace Prefix: | pnm_
Data Type: | dtr-types1:energyItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Profit Incentive Sliding Scale Multiplier + References No definition available. + Details
Name: | pnm_PublicUtilitiesProfitIncentiveSlidingScaleMultiplier
Namespace Prefix: | pnm_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Program Costs Related To Energy Efficiency, in Year Three + References No definition available. + Details
Name: | pnm_PublicUtilitiesProgramCostsRelatedToEnergyEfficiencyInYearThree
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Program Costs Related To Energy Efficiency, in Year Two + References No definition available. + Details
Name: | pnm_PublicUtilitiesProgramCostsRelatedToEnergyEfficiencyInYearTwo
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Program Costs Related To Energy Efficiency, Next Fiscal Year + References No definition available. + Details
Name: | pnm_PublicUtilitiesProgramCostsRelatedToEnergyEfficiencyNextFiscalYear
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Program Costs Related To Energy Efficiency, Number Of Programs + References No definition available. + Details
Name: | pnm_PublicUtilitiesProgramCostsRelatedToEnergyEfficiencyNumberOfPrograms
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
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: | dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_EnergyEfficiencyAndLoadManagementProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_A2021EnergyEfficiencyAnnualReportMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_TypeOfRegulatoryCostAxis=pnm_DisincentivesAndIncentivesAddedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_RenewablePortfolioStandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |