XML 81 R60.htm IDEA: XBRL DOCUMENT
v3.24.3

Variable Interest Entities - Narrative (Details) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) MW | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) MW | Sep. 30, 2023 USD ($) | Dec. 05, 2022 MW | Jan. 31, 2016 USD ($)
San Juan Generating Station | Coal supply |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Cash used to support bank letter or credit arrangement |  |  |  |  |  | $ 30.3
PNM |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of megawatts purchased (in megawatts) | MW |  |  |  |  | 64.1 |
PNM | Valencia |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Payment for fixed costs | $ 5.2 | $ 5.1 | $ 15.3 | $ 15.2 |  |
Payment for variable costs | $ 1.5 | $ 1.4 | $ 2.0 | $ 4.1 |  |
Long-term contract option to purchase, ownership percentage (up to) |  |  | 50.00% |  |  |
Long-term contract option to purchase, purchase price - percentage of adjusted NBV |  |  | 50.00% |  |  |
Long-term contract option to purchase, purchase price - percentage of FMV |  |  | 50.00% |  |  |
PNM | Purchased through May 2028 | Valencia |  |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |  |
Number of megawatts purchased (in megawatts) | MW | 155 |  | 155 |  |  |

X
- Definition Cash used to support bank letter or credit arrangement + References No definition available. + Details
Name: | pnm_CashUsedToSupportBankLetterOrCreditArrangement
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Long Term Contract For Purchase of Electric Power Fixed Charges + References No definition available. + Details
Name: | pnm_LongTermContractForPurchaseOfElectricPowerFixedCosts
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long Term Contract for Purchase of Electric Power Variable Charges + References No definition available. + Details
Name: | pnm_LongTermContractForPurchaseOfElectricPowerVariableCharges
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Long term contract option to purchase, ownership percentage + References No definition available. + Details
Name: | pnm_LongTermContractOptionToPurchaseOwnershipPercentage
Namespace Prefix: | pnm_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long term contract option to purchase, purchase price - percentage of adjusted NBV + References No definition available. + Details
Name: | pnm_LongTermContractOptionToPurchasePurchasePricePercentageOfAdjustedNBV
Namespace Prefix: | pnm_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Long term contract option to purchase, purchase price - percentage of FMV + References No definition available. + Details
Name: | pnm_LongTermContractOptionToPurchasePurchasePricePercentageOfFMV
Namespace Prefix: | pnm_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Mega Watts Purchased + References No definition available. + Details
Name: | pnm_NumberOfMegaWattsPurchased
Namespace Prefix: | pnm_
Data Type: | dtr-types1:powerItemType
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_JointlyOwnedUtilityPlantAxis=pnm_SanJuanGeneratingStationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=pnm_CoalSupplyMember
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: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=pnm_PurchasedThroughMay302028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |