XML 44 R62.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Regulatory and Rate Matters - Renewable Portfolio Standard and Energy Rider (Details) - Public Service Company of New Mexico [Member] | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2015 USD ($) MWh MW | Dec. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) MW | Dec. 31, 2014 USD ($) $ / MWh | Dec. 31, 2013 USD ($) | Feb. 27, 2015 USD ($)
Renewable Portfolio Standard [Member] | Required Percentage by 2011 [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Renewable Energy in Portfolio to Electric Sales | 10.00% |  | 10.00% |  |  |
Renewable Portfolio Standard [Member] | Required Percentage by 2015 [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Renewable Energy in Portfolio to Electric Sales | 15.00% |  | 15.00% |  |  |
Renewable Portfolio Standard [Member] | Required Percentage by 2020 [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Renewable Energy in Portfolio to Electric Sales | 20.00% |  | 20.00% |  |  |
Renewable Portfolio Standard [Member] | Minimum [Member] | Wind Energy [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Diversification | 30.00% |  | 30.00% |  |  |
Renewable Portfolio Standard [Member] | Minimum [Member] | Solar Energy [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Diversification | 20.00% |  | 20.00% |  |  |
Renewable Portfolio Standard [Member] | Minimum [Member] | Renewable Technologies [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Diversification | 5.00% |  | 5.00% |  |  |
Renewable Portfolio Standard [Member] | Minimum [Member] | Distributed Generation [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Required Percentage of Diversification | 3.00% |  | 3.00% |  |  |
Renewable Portfolio Standard [Member] | Maximum [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Reasonable Cost Threshold | 3.00% |  | 3.00% |  |  |
2014 Wind generated Renewable Energy Credits [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Number of Mega Watt Hours of Wind Generation | MWh | 50,000 |  |  |  |  |
Renewable Portfolio Standard 2014 [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Number of Mega Watts of Solar Photovoltaic Capacity | MW | 23 |  | 23 |  |  |
Public Utilities, Estimated Cost of Mega Watts of Solar Photovoltaic Capacity |  |  | $ 46,700,000 |  |  |
Public Utilities, Wind Capacity Planned Purchase Agreement Term |  |  | 20 years |  |  |
Public Utilities, Number of Mega Watts of Wind Energy Capacity | MW |  |  | 102 |  |  |
Public Utilities, First Year Cost of Wind Capacity Planned Purchase Agreement |  |  | $ 5,800,000.0 |  |  |
Public Utilities, Final Cost of Solar Photovoltaic Capacity |  |  |  |  | $ 46,500,000 |
Public Utilities, Cost of renewable resources procured | $ 100,000 | $ 100,000 |  |  |  |
2015 Wind generated Renewable Energy Credits [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Number of Mega Watt Hours of Wind Generation | MWh | 120,000 |  |  |  |  |
Renewable Portfolio Standard 2015 [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Number of Mega Watts of Solar Photovoltaic Capacity | MW | 40 |  | 40 |  |  |
Public Utilities, Estimated Cost of Mega Watts of Solar Photovoltaic Capacity |  |  | $ 79,300,000 |  |  |
Public Utilities, Approved Revised cost per MWh for additional necessary procurements to comply with RPS | $ / MWh |  |  |  | 3.00 |  |
Renewable Energy Rider [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Revenue from Renewable energy rider |  |  |  | $ 34,300,000 |  |
Renewable Energy Rider [Member] | Maximum [Member] |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Public Utilities, Rider Condition of Earned Return on Jurisdictional Equity in 2013 |  |  | 10.50% |  | 10.50% |
Public Utilities, Annual Revenue To be Collected Under 2015 Rider Rate | $ 44,700,000 |  | $ 44,700,000 |  |  |
Public Utilities, Revised Annual Revenue To be Collected Under 2015 Rider Rate |  |  |  |  |  | $ 43,000,000
Public Utilities, Annual Revenue To be Collected Under 2016 Rider Rate | $ 42,400,000 |  |  |  |  |

X
- Definition Public Utilities, Annual Revenue To be Collected Under 2015 Rider Rate + References No definition available. + Details
Name: | pnm_PublicUtilitiesAnnualRevenueTobeCollectedUnder2015RiderRate
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Public Utilities, Annual Revenue To be Collected Under 2016 Rider Rate + References No definition available. + Details
Name: | pnm_PublicUtilitiesAnnualRevenueTobeCollectedUnder2016RiderRate
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Approved Revised cost per MWh for additional necessary procurements to comply with RPS + References No definition available. + Details
Name: | pnm_PublicUtilitiesApprovedRevisedcostperMWhforadditionalnecessaryprocurementstocomplywithRPS
Namespace Prefix: | pnm_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Cost of renewable resources procured + References No definition available. + Details
Name: | pnm_PublicUtilitiesCostofrenewableresourcesprocured
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Estimated Cost of Mega Watts of Solar Photovoltaic Capacity + References No definition available. + Details
Name: | pnm_PublicUtilitiesEstimatedCostOfMegaWattsOfSolarPhotovoltaicCapacity
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Final Cost of Solar Photovoltaic Capacity + References No definition available. + Details
Name: | pnm_PublicUtilitiesFinalCostofSolarPhotovoltaicCapacity
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, First Year Cost of Wind Capacity Planned Purchase Agreement + References No definition available. + Details
Name: | pnm_PublicUtilitiesFirstYearCostofWindCapacityPlannedPurchaseAgreement
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Number of Mega Watts of Solar Photovoltaic Capacity + References No definition available. + Details
Name: | pnm_PublicUtilitiesNumberOfMegaWattsOfSolarPhotovoltaicCapacity
Namespace Prefix: | pnm_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Number of Mega Watt Hours of Wind Generation + References No definition available. + Details
Name: | pnm_PublicUtilitiesNumberofMegaWattHoursofWindGeneration
Namespace Prefix: | pnm_
Data Type: | num:energyItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Number of Mega Watts of Wind Energy Capacity + References No definition available. + Details
Name: | pnm_PublicUtilitiesNumberofMegaWattsofWindEnergyCapacity
Namespace Prefix: | pnm_
Data Type: | num:powerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reasonable Cost Threshold + References No definition available. + Details
Name: | pnm_PublicUtilitiesReasonableCostThreshold
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulated Operations, Required Percentage of Diversification + References No definition available. + Details
Name: | pnm_PublicUtilitiesRequiredPercentageOfDiversification
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Regulated Operations, Required Percentage of Renewable Energy in Portfolio to Electric Sales + References No definition available. + Details
Name: | pnm_PublicUtilitiesRequiredPercentageOfRenewableEnergyInPortfolioToElectricSales
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Revenue from Renewable energy rider + References No definition available. + Details
Name: | pnm_PublicUtilitiesRevenuefromRenewableenergyrider
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Public Utilities, Revised Annual Revenue To be Collected Under 2015 Rider Rate + References No definition available. + Details
Name: | pnm_PublicUtilitiesRevisedAnnualRevenueTobeCollectedUnder2015RiderRate
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Public Utilities, Rider Condition of Earned Return on Jurisdictional Equity in 2013 + References No definition available. + Details
Name: | pnm_PublicUtilitiesRiderConditionOfEarnedReturnOnJurisdictionalEquityIn2013
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Wind Capacity Planned Purchase Agreement Term + References No definition available. + Details
Name: | pnm_PublicUtilitiesWindCapacityPlannedPurchaseAgreementTerm
Namespace Prefix: | pnm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_RenewablePortfolioStandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageBy2011Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageBy2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DateOfRegulatoryActionAxis=pnm_RequiredPercentageBy2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DiversificationByTypeAxis=pnm_WindEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DiversificationByTypeAxis=pnm_SolarEnergyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DiversificationByTypeAxis=pnm_RenewableTechnologiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_DiversificationByTypeAxis=pnm_DistributedGenerationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_A2014WindgeneratedRenewableEnergyCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_RenewablePortfolioStandard2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_A2015WindgeneratedRenewableEnergyCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_RenewablePortfolioStandard2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | pnm_ScheduleOfRegulatoryRateMattersAxis=pnm_RenewableEnergyRiderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |