XML 70 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Commitments and Contingencies (Other Commitments and Contingencies) (Details) (USD $) |  |  |  |  | 6 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  | 6 Months Ended |  |  |  |  |  | 1 Months Ended |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Public Service Company of New Mexico [Member] | Dec. 31, 2011 Public Service Company of New Mexico [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Loss on Long-term Purchase Commitment [Member] | Jul. 31, 2012 Public Service Company of New Mexico [Member] Transmissions Issues [Member] | Aug. 31, 2010 Public Service Company of New Mexico [Member] Transmissions Issues [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] TGP Granada, LLC and its affiliate Complaint [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Jun. 30, 2011 Public Service Company of New Mexico [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Jun. 30, 2011 Public Service Company of New Mexico [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Dec. 31, 2011 Public Service Company of New Mexico [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Underground [Member] Loss on Long-term Purchase Commitment [Member] | Dec. 31, 2011 Public Service Company of New Mexico [Member] Underground [Member] Loss on Long-term Purchase Commitment [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] San Juan Generating Station [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] San Juan Generating Station [Member] Coal Supply [Member] | Dec. 31, 2011 Public Service Company of New Mexico [Member] San Juan Generating Station [Member] Coal Supply [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] San Juan Generating Station [Member] Underground [Member] Loss on Long-term Purchase Commitment [Member] | Apr. 30, 2012 Public Service Company of New Mexico [Member] San Juan Generating Station [Member] Fuel and Purchased Power Adjustment Clause [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] San Juan Generating Station And Four Corners [Member] Surface [Member] Loss on Long-term Purchase Commitment [Member] | Apr. 30, 2010 Public Service Company of New Mexico [Member] Palo Verde Nuclear Generating Station [Member] Water Supply [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Palo Verde Nuclear Generating Station [Member] Nuclear Plant [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Palo Verde Nuclear Generating Station [Member] Nuclear Plant [Member] Maximum [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Palo Verde Nuclear Generating Station [Member] Nuclear Plant [Member] Commercial Providers [Member] | Jun. 30, 2012 Public Service Company of New Mexico [Member] Palo Verde Nuclear Generating Station [Member] Nuclear Plant [Member] Industry Wide Retrospective Assessment Program [Member] | Jun. 30, 2012 Tortoise Capital Resources Corporation [Member] TGP Granada, LLC and its affiliate Complaint [Member]
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Inventories of previously mined coal available to supply the fuel requirements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8 months 15 days |  |  |  |  |  |  |  |  |  |  |
Other current assets | $ 41,463,000 | $ 33,397,000 | $ 36,376,000 | $ 26,776,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,000,000 | $ 14,600,000 |  |  |  |  |  |  |  |  |
Loss Contingency, Estimate of Possible Loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,500,000 |  | 51,900,000 |  |  |  |  |  |
Loss Contingency Accrual, Carrying Value, Payments |  |  |  |  |  |  |  |  | 900,000 | 1,300,000 | 2,300,000 | 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingency Accrual, at Carrying Value |  |  |  |  |  |  |  |  | 25,200,000 |  | 25,200,000 |  | 26,500,000 | 4,400,000 | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Estimated Initial Funding Requirements |  |  |  |  | 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Estimated Initial Funding Requirements, Additional to be Funded |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Final Reclamation, capped amount to be collected |  |  |  |  |  |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preliminary estimate increased deferral related to mine fire incident |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,300,000 |  |  |  |  |  |  |
Public Utilities, Liability Insurance Coverage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,600,000,000 | 375,000,000 | 12,200,000,000 |
Public Utilities, Ownership Percentage in Nuclear Reactor |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.20% |  |  |  |
Public Utilities, Maximum Potential Assessment Per Incident |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,000,000 |  |  |  |
Public Utilities, Annual Payment Limitation Related to Incident |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,400,000 |  |  |  |
Public Utilities, Aggregate Amount of All Risk Insurance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,750,000,000 |  |  |  |
Public Utilities, Maximum Amount under Nuclear Electir Insurance Limited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,300,000 |  |  |  |
Litigation Settlement, Gross |  |  |  |  |  | $ 200,000 | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Lease ownership percentage in EIP |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40.00%
Public Utilites, Option to renew portion of current EIP lease payments for maximum term to be calculated at end of initial lease term |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Signed an agreement with cities to provide cooling water essential to power production |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40 years |  |  |  |  |

X
- Definition Final Reclamation, capped amount to be collected + References No definition available. + Details
Name: | pnm_FinalReclamationCappedAmountToBeCollected
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Preliminary estimate increased deferral related to mine fire incident + References No definition available. + Details
Name: | pnm_PreliminaryEstimateIncreasedDeferralRelatedToMineFireIncident
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Public Utilites, Option to renew portion of current EIP lease payments for maximum term to be calculated at end of initial lease term + References No definition available. + Details
Name: | pnm_PublicUtilitesOptionToRenewPortionOfCurrentEipLeasePaymentsForMaximumTermToBeCalculatedAtEndOfInitialLeaseTerm
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Aggregate Amount of All Risk Insurance + References No definition available. + Details
Name: | pnm_PublicUtilitiesAggregateAmountOfAllRiskInsurance
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Annual Payment Limitation Related to Incident + References No definition available. + Details
Name: | pnm_PublicUtilitiesAnnualPaymentLimitationRelatedToIncident
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Estimated Initial Funding Requirements + References No definition available. + Details
Name: | pnm_PublicUtilitiesEstimatedInitialFundingRequirements
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Estimated Initial Funding Requirements, Additional to be Funded + References No definition available. + Details
Name: | pnm_PublicUtilitiesEstimatedInitialFundingRequirementsAdditionalToBeFunded
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Public Utilities, Inventories of previously mined coal available to supply the fuel requirements + References No definition available. + Details
Name: | pnm_PublicUtilitiesInventoriesOfPreviouslyMinedCoalAvailableToSupplyFuelRequirements
Namespace Prefix: | pnm_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Lease ownership percentage in EIP + References No definition available. + Details
Name: | pnm_PublicUtilitiesLeaseOwnershipPercentageInEip
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Public Utilities, Liability Insurance Coverage + References No definition available. + Details
Name: | pnm_PublicUtilitiesLiabilityInsuranceCoverage
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Maximum Amount under Nuclear Electir Insurance Limited + References No definition available. + Details
Name: | pnm_PublicUtilitiesMaximumAmountUnderNuclearElectirInsuranceLimited
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Maximum Potential Assessment Per Incident + References No definition available. + Details
Name: | pnm_PublicUtilitiesMaximumPotentialAssessmentPerIncident
Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Ownership Percentage in Nuclear Reactor + References No definition available. + Details
Name: | pnm_PublicUtilitiesOwnershipPercentageInNuclearReactor
Namespace Prefix: | pnm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Public Utilities, Signed an agreement with cities to provide cooling water essential to power production + References No definition available. + Details
Name: | pnm_PublicUtilitiesSignedAgreementWithCitiesToProvideCoolingWaterEssentialToPowerProduction
Namespace Prefix: | pnm_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6952336&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The payments made in the period which reduced loss contingency liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6952336&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualCarryingValuePayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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 Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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=6952336&loc=d3e14435-108349 Reference 3: 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=6952336&loc=d3e14557-108349 + Details
Name: | us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 8 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_OtherAssetsCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant