XML 110 R91.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Regulatory and Rate Matters - TNMP Narrative (Details) - TNMP - USD ($) $ in Millions | Apr. 01, 2024 | Sep. 28, 2023 | Mar. 01, 2022
--- | --- | --- | ---
Public Utilities, Commitments And Contingencies [Line Items] |  |  |
Energy efficiency cost recovery, requested change amount |  |  | $ 7.3
Energy efficiency cost recovery, requested bonus |  |  | $ 1.9
Energy efficiency cost recovery factor, recovery |  | $ 6.6 |
Energy efficiency cost recovery factor, approved performance bonus |  | $ 1.2 |
Subsequent event |  |  |
Public Utilities, Commitments And Contingencies [Line Items] |  |  |
Requested rate increase (decrease) | $ 15.9 |  |
Recovery of base rate | $ 207.4 |  |

X
- Definition Energy Efficiency Cost Recovery Factor, Approved Performance Bonus + References No definition available. + Details
Name: | pnm_EnergyEfficiencyCostRecoveryFactorApprovedPerformanceBonus
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Energy Efficiency Cost Recovery Factor, Recovery + References No definition available. + Details
Name: | pnm_EnergyEfficiencyCostRecoveryFactorRecovery
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Energy Efficiency Cost Recovery Factor, Requested Change Amount + References No definition available. + Details
Name: | pnm_EnergyEfficiencyCostRecoveryFactorRequestedChangeAmount
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Energy Efficiency Cost Recovery Factor, Requested Performance Bonus + References No definition available. + Details
Name: | pnm_EnergyEfficiencyCostRecoveryFactorRequestedPerformanceBonus
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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, Recovery Of Base Rate + References No definition available. + Details
Name: | pnm_PublicUtilitiesRecoveryOfBaseRate
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of public utility's requested rate increase (decrease) with regulatory agency. + References No definition available. + Details
Name: | us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=pnm_TexasNewMexicoPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |