XML 82 R101.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Commitments and Contingencies - The Energy Transition Act (Details) - Electric-Generation Portfolio Standard - Energy Transition Act | Jun. 14, 2019
--- | ---
Required Percentage by 2020 |
Public Utilities, General Disclosures [Line Items] |
Renewable energy, percentage | 0.20
Required Percentage by 2025 |
Public Utilities, General Disclosures [Line Items] |
Renewable energy, percentage | 0.40
Required Percentage by 2030 |
Public Utilities, General Disclosures [Line Items] |
Renewable energy, percentage | 0.50
Required Percentage by 2040 |
Public Utilities, General Disclosures [Line Items] |
Renewable energy, percentage | 0.80
Required Percentage by 2045 |
Public Utilities, General Disclosures [Line Items] |
Renewable energy, percentage | 1

X
- Definition Public Utilities, Renewable Energy, Percentage + References No definition available. + Details
Name: | pnm_PublicUtilitiesRenewableEnergyPercentage
Namespace Prefix: | pnm_
Data Type: | xbrli:pureItemType
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: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_ElectricGenerationPortfolioStandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageBy2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_CommitmentsAndContingenciesRelatedToEnvironmentAndOtherNatureAxis=pnm_EnergyTransitionActMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageby2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageby2030Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageby2040Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageby2045Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |