XML 162 R140.htm IDEA: XBRL DOCUMENT
v3.22.4

Income Taxes - Carryforwards (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Taxes, Impairment of Carryforwards |  |  |
Federal tax credit carryforwards | $ 187 | $ 1,029 | $ (425)
Compensation expense | 199 | 119 | 96
Income Taxes, Reserve Balances |  |  |
Federal tax credit carryforwards | 1,216 | 1,029 |
Compensation expense | 725 | 526 |
Internal Revenue Service (IRS) |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal net operating loss carryforwards | 382,000 |  |
Federal tax credit carryforwards that expire beginning in 2023 | 123,800 |  |
Public Service Company of New Mexico |  |  |
Income Taxes, Impairment of Carryforwards |  |  |
Federal tax credit carryforwards | 427 | 0 | 0
Compensation expense | 140 | 84 | 61
Income Taxes, Reserve Balances |  |  |
Federal tax credit carryforwards | 427 | 0 |
Compensation expense | 483 | 343 |
Texas-New Mexico Power Company |  |  |
Income Taxes, Impairment of Carryforwards |  |  |
Federal tax credit carryforwards | 0 | 0 | 0
Compensation expense | 59 | 35 | $ 35
Income Taxes, Reserve Balances |  |  |
Federal tax credit carryforwards | 0 | 0 |
Compensation expense | $ 241 | $ 182 |

X
- Definition Compensation Expense, Impairment + References No definition available. + Details
Name: | pnm_CompensationExpenseImpairment
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Federal Tax Credit Carryforwards that Expire Beginning in 2023 + References No definition available. + Details
Name: | pnm_FederalTaxCreditCarryforwardsThatExpireBeginningIn2023
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Income Taxes, Impairment of Carryforwards [Abstract] + References No definition available. + Details
Name: | pnm_IncomeTaxesImpairmentofCarryforwardsAbstract
Namespace Prefix: | pnm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income Taxes, Reserve Balances [Abstract] + References No definition available. + Details
Name: | pnm_IncomeTaxesReserveBalancesAbstract
Namespace Prefix: | pnm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reserve balance, State tax credit carryforward + References No definition available. + Details
Name: | pnm_ReservebalanceStatetaxcreditcarryforward
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reverse Balance, Compensation Expense + References No definition available. + Details
Name: | pnm_ReverseBalanceCompensationExpense
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition State Tax Credit Carryforward, Impairment + References No definition available. + Details
Name: | pnm_StateTaxCreditCarryforwardImpairment
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_InternalRevenueServiceIRSMember
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: | dei_LegalEntityAxis=pnm_TexasNewMexicoPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |