XML 24 R108.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Commitments and Contingencies - Water Supply (Details) - Public Service Company of New Mexico - Palo Verde Nuclear Generating Station | 1 Months Ended
--- | ---
Apr. 30, 2010 city
Public Utilities, General Disclosures [Line Items] |
Providing water to a number of cities | 5
Providing water, term | 40 years

X
- Definition Public Utilities, Provide Water for Period of Time + References No definition available. + Details
Name: | pnm_PublicUtilitiesProvideWaterforPeriodofTime
Namespace Prefix: | pnm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Provide Water to Number of Cities + References No definition available. + Details
Name: | pnm_PublicUtilitiesProvideWatertoNumberofCities
Namespace Prefix: | pnm_
Data Type: | xbrli:integerItemType
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_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: | us-gaap_JointlyOwnedUtilityPlantAxis=pnm_PaloVerdeNuclearGeneratingStationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |