XML 138 R108.htm IDEA: XBRL DOCUMENT
v3.20.4

Commitments and Contingencies - Navajo National Allottee Matters (Details) - Navajo Nation Allottee Matters - Public Service Company of New Mexico | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2012 landowner | Dec. 31, 2020 Allotment_Parcel | Dec. 01, 2015 Allotment_Parcel | Jul. 13, 2015 a | Jan. 22, 2015 Allotment_Parcel
Loss Contingencies [Line Items] |  |  |  |  |
Number of landowners involved in the appeal | landowner | 43 |  |  |  |
Number of allotments where landowners are revoking rights of way renewal consents (in allotment parcels) |  | 6 |  |  |
Allotments with right-of-way renewals not previously contested (in allotment parcels) |  |  |  |  | 10
Acres of land at issue (in acres) | a |  |  |  | 15.49 |
Number of allotment parcels that cannot be condemned |  |  | 2 |  |
Number of allotment parcels at issue |  |  | 5 |  |

X
- Definition Number of allotment parcels' at issue + References No definition available. + Details
Name: | pnm_NumberOfAllotmentParcelsAtIssue
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of allotment parcels' at issue, Not to be condemned + References No definition available. + Details
Name: | pnm_NumberOfAllotmentParcelsAtIssueNotToBeCondemned
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Allotments Where Landowners Are Revoking Right Of Way Renewal Consents + References No definition available. + Details
Name: | pnm_NumberOfAllotmentsWhereLandownersAreRevokingRightOfWayRenewalConsents
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number Of Landowners Involved In The Appeal + References No definition available. + Details
Name: | pnm_NumberOfLandownersInvolvedInTheAppeal
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Allotments, Previously Contested Rights Of Way Renewal Consents + References No definition available. + Details
Name: | pnm_NumberofAllotmentsPreviouslyContestedRightsOfWayRenewalConsents
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Area of land held. + References No definition available. + Details
Name: | us-gaap_AreaOfLand
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=pnm_NavajoNationAllotteeMattersMember
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: |