XML 39 R52.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Commitments and Contingencies - Nuclear Spent Fuel and Waste Disposal (Details) - Palo Verde Nuclear Generating Station [Member] - Public Service Company of New Mexico [Member] - USD ($) |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 07, 2014 | Mar. 31, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Dec. 31, 2014
Nuclear Spent Fuel And Waste Disposal [Member] |  |  |  |  |
Public Utilities, Commitments And Contingencies [Line Items] |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  | $ 58,000,000 |
Revised Annual Fee, Nuclear Waste Disposal |  |  | $ 0 |  |
Nuclear Spent Fuel And Waste Disposal [Member] | Other Deferred Credits [Member] |  |  |  |  |
Public Utilities, Commitments And Contingencies [Line Items] |  |  |  |  |
Loss Contingency Accrual |  |  |  | $ 12,500,000 | $ 12,300,000
Nuclear Spent Fuel And Waste Disposal [Member] | Settled Litigation [Member] |  |  |  |  |
Public Utilities, Commitments And Contingencies [Line Items] |  |  |  |  |
Lawsuit settlement, third party receipt | $ 57,400,000 |  |  |  |
PNMs share of lawsuit settlement, third party receipt | $ 5,900,000 |  |  |  |
Department of energy, spent nuclear fuel removal July 2011 - June 2014 [Member] |  |  |  |  |
Public Utilities, Commitments And Contingencies [Line Items] |  |  |  |  |
Lawsuit settlement, third party receipt |  | $ 42,000,000 |  |  |
PNMs share of third party settlement claim |  | 4,300,000 |  |  |
Litigation Settlement, Portion credited to customers |  | $ 3,100,000 |  |  |

X
- Definition Lawsuit settlement, third party receipt + References No definition available. + Details
Name: | pnm_Lawsuitsettlementthirdpartyreceipt
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Litigation Settlement, Portion credited to customers + References No definition available. + Details
Name: | pnm_LitigationSettlementPortioncreditedtocustomers
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition PNMs share of lawsuit settlement, third party receipt + References No definition available. + Details
Name: | pnm_PNMsshareoflawsuitsettlementthirdpartyreceipt
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition PNMs share of third party settlement claim + References No definition available. + Details
Name: | pnm_PNMsshareofthirdpartysettlementclaim
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Public Utilities, Commitments And Contingencies [Line Items] + References No definition available. + Details
Name: | pnm_PublicUtilitiesCommitmentsAndContingenciesLineItems
Namespace Prefix: | pnm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revised Annual Fee, Nuclear Waste Disposal + References No definition available. + Details
Name: | pnm_RevisedAnnualFeeNuclearWasteDisposal
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=pnm_NuclearSpentFuelAndWasteDisposalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_LitigationStatusAxis=us-gaap_SettledLitigationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=pnm_DepartmentofenergyspentnuclearfuelremovalJuly2011June2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |