XML 106 R87.htm IDEA: XBRL DOCUMENT
v3.22.2

Regulatory and Rate Matters - FERC Compliance (Details) - Public Service Company of New Mexico $ in Millions | Jun. 16, 2022 USD ($)
--- | ---
Public Utilities, General Disclosures [Line Items] |
Compliance extension period | 75 days
Compliance extension period, repost period | 30 days
FERC Proceedings One |
Public Utilities, General Disclosures [Line Items] |
Time-value customer refund | $ 7.0
FERC Proceedings Two |
Public Utilities, General Disclosures [Line Items] |
Time-value customer refund | $ 28.0

X
- Definition Compliance Extension Period + References No definition available. + Details
Name: | pnm_ComplianceExtensionPeriod
Namespace Prefix: | pnm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Compliance Extension Period, Repost Period + References No definition available. + Details
Name: | pnm_ComplianceExtensionPeriodRepostPeriod
Namespace Prefix: | pnm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Time-Value Customer Refund Liability + References No definition available. + Details
Name: | pnm_TimeValueCustomerRefundLiability
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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: | dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=pnm_FERCProceedingsOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=pnm_FERCProceedingsTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |