XML 151 R121.htm IDEA: XBRL DOCUMENT v3.20.4

Regulatory and Rate Matters - Transportation Electrification Program (Details) - Transportation Electrification Program - Public Service Company of New Mexico $ in Millions	Dec. 18, 2020 USD ($)
Public Utilities, General Disclosures [Line Items]
Expected budgeted expenditures	$ 8.4
Budget flexibility, percent	25.00%
Budget portion dedicated to low and moderate income customers, percent	25.00%

X

- Definition

Public Utilities, Budget Flexibility, Percent

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesBudgetFlexibilityPercent
Namespace Prefix:	pnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Public Utilities, Budget Portion Dedicated To Low And Moderate Income Customers, Percent

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesBudgetPortionDedicatedToLowAndModerateIncomeCustomersPercent
Namespace Prefix:	pnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Public Utilities, Expected Budgeted Expenditures

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesExpectedBudgetedExpenditures
Namespace Prefix:	pnm_
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_PublicUtilitiesGeneralDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_TransportationElectrificationProgramMember
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: