XML 102 R85.htm IDEA: XBRL DOCUMENT
v3.23.1

Regulatory and Rate Matters - Battery Energy Storage System Certificate of Public Convenience and Necessity ("CCN") (Details) - Subsequent event - Public Service Company of New Mexico $ in Millions | May 03, 2023 USD ($) storageSystem MW
--- | ---
Public Utilities, General Disclosures [Line Items] |
Number of battery storage systems | storageSystem | 2
Battery energy storage systems (in megawatts) | MW | 6
Battery energy storage system, costs | $ | $ 25.8

X
- Definition Number Of Battery Storage Systems + References No definition available. + Details
Name: | pnm_NumberOfBatteryStorageSystems
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Battery Energy Storage System, Costs + References No definition available. + Details
Name: | pnm_PublicUtilitiesBatteryEnergyStorageSystemCosts
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Battery Energy Storage Systems Megawatts + References No definition available. + Details
Name: | pnm_PublicUtilitiesBatteryEnergyStorageSystemsMegawatts
Namespace Prefix: | pnm_
Data Type: | dtr-types:powerItemType
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: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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: |