XML 150 R119.htm IDEA: XBRL DOCUMENT v3.6.0.2

Regulatory and Rate Matters - Advanced Metering Infrastructure Application and Facebook Data Center Project (Details) $ in Millions	Jul. 08, 2016 service_rate MW	Feb. 26, 2016 USD ($)
Public Utilities, General Disclosures [Line Items]
Number of requested service rates | service_rate	2
Public Service Company of New Mexico [Member] | Advanced metering infrastructure [Member]
Public Utilities, General Disclosures [Line Items]
Application to seek recovery of costs of project | $		$ 87.2
Application to seek recovery of undepreciated investment | $		$ 33.0
PNMR Development [Member]
Public Utilities, General Disclosures [Line Items]
Solar distributed generation (in mw) | MW	30
Solar capacity (in mw) | MW	10

X

- Definition

Public Utilities, Estimated Future Investment

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesEstimatedFutureInvestment
Namespace Prefix:	pnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Public Utilities, Estimated costs to be recovered

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesEstimatedcoststoberecovered
Namespace Prefix:	pnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Public Utilities, Number of Requested Rates

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesNumberofRequestedRates
Namespace Prefix:	pnm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Public Utilities, Solar generation capacity in Megawatts

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesSolargenerationcapacityinMegawatts
Namespace Prefix:	pnm_
Data Type:	num:powerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Public Utilities, Solar generation capacity in Megawatts, current construction

+ References

No definition available.

+ Details

Name:	pnm_PublicUtilitiesSolargenerationcapacityinMegawattscurrentconstruction
Namespace Prefix:	pnm_
Data Type:	num: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

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:	dei_LegalEntityAxis=pnm_PublicServiceCompanyOfNewMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_AdvancedmeteringinfrastructureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=pnm_PNMRDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: