XML 65 R50.htm IDEA: XBRL DOCUMENT
v3.23.3

Regulatory and Rate Matters (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2023
Regulated Operations [Abstract] |
Schedule of Rate Increases for Transmission Costs | The following sets forth TNMP’s recent interim transmission cost rate increases:
Effective Date |  | Approved Increase in Rate Base |  | Annual Increase in Revenue
|  | (In millions)
September 20, 2021 |  | $ | 41.2 |  |  | $ | 6.3 |
March 25, 2022 |  | 95.6 |  |  | 14.2 |
September 22, 2022 |  | 36.0 |  |  | 5.3 |
May 12, 2023 |  | 150.5 |  |  | 19.4 |
September 6, 2023 |  | 21.4 |  |  | 4.2 |
Schedule Of Interim Distribution Rate Increases | The following sets forth TNMP’s recent interim distribution rate increases:
Effective Date |  | Approved Increase in Rate Base |  | Annual Increase in Revenue
|  | (In millions)
September 1, 2021 |  | $ | 104.5 |  |  | $ | 13.5 |
September 1, 2022 |  | 95.7 |  |  | 6.8 |
September 1, 2023 |  | 157.0 |  |  | 14.5 |

X
- Definition Schedule Of Interim Distribution Rate Increases + References No definition available. + Details
Name: | pnm_ScheduleOfInterimDistributionRateIncreasesTableTextBlock
Namespace Prefix: | pnm_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Rate Increases for Transmission Costs [Table Text Block] + References No definition available. + Details
Name: | pnm_ScheduleOfRateIncreasesForTransmissionCostsTableTextBlock
Namespace Prefix: | pnm_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RegulatedOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration