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Regulatory and Rate Matters (Details) (USD $) |  | 1 Months Ended | 6 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  | 3 Months Ended |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 0 Months Ended | 6 Months Ended |  |  | 0 Months Ended | 3 Months Ended |  |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 0 Months Ended |  |  |  |  | 0 Months Ended |  | 1 Months Ended | 0 Months Ended |  | 1 Months Ended | 3 Months Ended |
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Jun. 30, 2013 Public Service Company of New Mexico [Member] Emergency FPPAC [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] La Luz Generating Station [Member] MW | Dec. 31, 2011 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Minimum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Maximum [Member] | Mar. 31, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Maximum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Wind Energy [Member] Minimum [Member] | Dec. 31, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Wind Energy [Member] Minimum [Member] | Dec. 31, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Solar Energy [Member] Minimum [Member] | Sep. 30, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Solar Energy [Member] Minimum [Member] | Dec. 31, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Renewable Technologies [Member] Minimum [Member] | Sep. 30, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Renewable Technologies [Member] Minimum [Member] | Dec. 31, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Distributed Generation [Member] Minimum [Member] | Sep. 30, 2012 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Distributed Generation [Member] Minimum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Required Percentage by 2011 [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Required Percentage by 2015 [Member] | Mar. 31, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Required Percentage by 2015 [Member] Distributed Generation [Member] Minimum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard [Member] Required Percentage by 2020 [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard Supplemental Procurement [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard Supplemental Procurement Reduction [Member] Minimum [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard Supplemental Procurement Reduction [Member] Maximum [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2014 Wind generated Renewable Energy Credits [Member] MWh | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard 2014 [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Portfolio Standard 2014 [Member] MW | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2015 Wind generated Renewable Energy Credits [Member] MWh | Aug. 20, 2011 Public Service Company of New Mexico [Member] NMPRC Rulemaking on Disincentives to Energy Efficiency Programs [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] NMPRC Rulemaking on Disincentives to Energy Efficiency Programs [Member] | Nov. 29, 2010 Public Service Company of New Mexico [Member] NMPRC Rulemaking on Disincentives to Energy Efficiency Programs [Member] | May 03, 2010 Public Service Company of New Mexico [Member] NMPRC Rulemaking on Disincentives to Energy Efficiency Programs [Member] Per KWh [Member] Maximum [Member] | May 03, 2010 Public Service Company of New Mexico [Member] NMPRC Rulemaking on Disincentives to Energy Efficiency Programs [Member] Per kilowatt [Member] | Oct. 05, 2012 Public Service Company of New Mexico [Member] 2010 Energy Efficiency Application [Member] Disincentives / Incentives Adder [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2010 Energy Efficiency Application [Member] Disincentives / Incentives Adder [Member] | Aug. 11, 2011 Public Service Company of New Mexico [Member] 2010 Energy Efficiency Application [Member] Disincentives / Incentives Adder [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2010 Energy Efficiency Application [Member] Per KWh [Member] Amended [Member] Minimum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2010 Energy Efficiency Application [Member] Per kilowatt [Member] Amended [Member] Minimum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] 2010 Electric Rate Case [Member] | Mar. 31, 2013 Public Service Company of New Mexico [Member] 2010 Electric Rate Case [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Energy Rider [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Energy Rider [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Energy Rider [Member] Maximum [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Renewable Energy Rider [Member] Maximum [Member] | Dec. 31, 2012 Public Service Company of New Mexico [Member] Renewable Energy Rider [Member] Maximum [Member] | Jul. 31, 2011 Public Service Company of New Mexico [Member] Integrated Resource Plan, 2011 [Member] Protests_Filed | Jun. 30, 2013 Public Service Company of New Mexico [Member] Integrated Resource Plan, 2011 [Member] | Jul. 03, 2012 Public Service Company of New Mexico [Member] Transmission Rate Case [Member] | Oct. 27, 2010 Public Service Company of New Mexico [Member] Transmission Rate Case [Member] | Jul. 26, 2013 Public Service Company of New Mexico [Member] Formula Transmission Rate Case [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] Formula Transmission Rate Case [Member] | Jan. 02, 2013 Public Service Company of New Mexico [Member] Formula Transmission Rate Case [Member] | Dec. 06, 2012 Public Service Company of New Mexico [Member] Firm Requirements Wholesale Power Rate Case [Member] | Sep. 15, 2011 Public Service Company of New Mexico [Member] Firm Requirements Wholesale Power Rate Case [Member] | Jun. 30, 2013 Public Service Company of New Mexico [Member] City of Gallup, New Mexico Contract [Member] | Jul. 31, 2011 Texas-New Mexico Power Company [Member] Advanced Meter System Deployment and Surcharge Request [Member] | Aug. 28, 2012 Texas-New Mexico Power Company [Member] Energy Efficiency [Member] | Jun. 30, 2013 Texas-New Mexico Power Company [Member] Energy Efficiency [Member] | Jan. 31, 2013 Texas-New Mexico Power Company [Member] Transmission Rate Filings [Member] | Jun. 30, 2013 Texas-New Mexico Power Company [Member] August 2013 Transmission Rate Filings [Member] | Jun. 30, 2013 Delta [Member] Public Service Company of New Mexico [Member] Applications for Approvals to Purchase Delta [Member] MW
Rate Matters [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Required Percentage of Renewable Energy in Portfolio to Electric Sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% | 15.00% |  | 20.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Required Percentage of Diversification |  |  |  |  |  |  |  | 20.00% | 30.00% | 20.00% | 20.00% | 5.00% | 10.00% | 1.50% | 1.50% |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Reasonable Cost Threshold |  |  |  |  | 2.00% | 3.00% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Annual Incremental Increase in Reasonable Cost Threshold |  |  |  | 0.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilites, Additional Renewable Procurements Spending Required by NMPRC |  |  | $ 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Number of Mega Watts of Solar PV Capacity |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 | 1.5 | 2 |  | 23 | 23 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Number of Mega Watts of Wind Energy Capcity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, First Year Cost of Wind Capacity Planned Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,800,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Number of Mega Watt Hours of Wind Generation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000 |  |  | 120,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rider Rate For 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0044391 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Estimated Cost of Mega Watts of Solar PV Capacity |  |  |  | 45,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500,000 |  |  |  |  | 46,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Number of Mega Watts of Geothermal Capacity |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Wind Capacity Planned Purchase Agreement Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Program Costs Related To Energy Efficiency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Proposed Profit Incentive Adder Revenues Related To Energy Efficiency Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,200,000 | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Adder Allowed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.01 | 10 |  |  |  | 0.002 | 4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider Recovered |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Regulatory Costs Approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900,000 |  |  |  |  |  |  |  |  |
Percentage ownership of EIP transmission line |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |  |  |
Public Utilities, Eliminated Recovery of Adder Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider Net Over-Recovery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider Program Costs Over-Recovery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider Incentives Under-Recovery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider Estimated Incentives Under-Recovery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Regulatory Costs to be Collected |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36,200,000 | 38,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Regulatory Costs Incurred and Eligible For Recovery, Amount Deferred for Collection in Future Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 49,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Additional Revenue To be Collected in 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Additional Revenue To be Collected in 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rider Condition of Earned Return on Jurisdictional Equity in 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Rate Rider to be Implemented |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.030468 | 0.030468 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rider Rate For 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0022335 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Approved Rider Rate For 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0028371 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Order Disapproved Recovery of Costs As Regulatory Agency Had Not Acted on Specific Procurements Proposed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Planning Period Covered of IRP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Number of protests that were filed to IRP requesting rejection of the plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Regulatory Costs Not yet Approved | 8,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11,100,000 | 1,300,000 | 3,200,000 |  |  | 8,700,000 |  |  |  |  |  |  |
Public Utilites, Number of Mega Watts Natural Gas Peaking Units to be Purchased |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 132
Public Utilities, Number of Mega Watts of Gas-fired Generation |  | 40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Installation Capital Costs |  | 63,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Return on Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.1225 |  | 0.1081 |  |  |  |  |  |  |  |  |  |
Public Utilities, Regulatory Rate Increase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.398 |  |  |  |  |  |  |
Public Utilities, Collection of Deployment Costs Through Surcharge Period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 years |  |  |  |  |
Public Utilities, Completion Period of Advanced Meter Deployment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Public Utilities, Increase Annual Transmission Service Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Additional Revenue from Proposed Rates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,900,000 | 18,100,000 |
Public Utilities, Total Revenue Requirement Increase |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,300,000 |  |  |  |  |  | 2,900,000 | 2,800,000 |
Public Utilities, Contract Extension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |
Public Utilities, Estimated Increase in Revenue over amendment term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,100,000 |  |  |  |  |  |
Public Utilities, Approved Deployment Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 113,300,000 |  |  |  |  |
Public Utilities, Approved Program Implementation Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,800,000 |  |  |  |
Public Utilities, Approved Program Implementation Costs, Bonus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400,000 |  |  |  |
Public Utilities, Unapproved 2014 Program Implementation Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,600,000 |  |  |
Public Utilities, Unapproved 2014 Program Implementation Costs, Expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,700,000 |  |  |
Public Utilities, Unapproved 2014 Program Implementation Costs, Bonus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 |  |  |
Public Utilities, Unapproved 2014 Program Implementation Costs, Overcollection refund |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |
Public Utilities, Retention Percentage of Sales Margins |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Frequency of IRP filings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | P3Y |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Percentage ownership of EIP transmission line + References No definition available. + Details
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- Definition Public Utilites, Additional Renewable Procurements Spending Required by NMPRC + References No definition available. + Details
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- Definition Public Utilites, Number of Mega Watts Natural Gas Peaking Units to be Purchased + References No definition available. + Details
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- Definition Public Utilities, Additional Revenue from Proposed Rates + References No definition available. + Details
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- Definition Public Utilities, Additional Revenue To be Collected in 2012 + References No definition available. + Details
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- Definition Public Utilities, Additional Revenue To be Collected in 2013 + References No definition available. + Details
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- Definition Public Utilities, Approved Deployment Costs + References No definition available. + Details
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- Definition Public Utilities, Approved Program Implementation Costs + References No definition available. + Details
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- Definition Public Utilities, Approved Program Implementation Costs, Bonus + References No definition available. + Details
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- Definition Public Utilities, Approved Rider Rate For 2012 + References No definition available. + Details
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- Definition Public Utilities, Approved Rider Rate For 2013 + References No definition available. + Details
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- Definition Public Utilities, Collection of Deployment Costs Through Surcharge Period + References No definition available. + Details
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- Definition Public Utilities, Completion Period of Advanced Meter Deployment + References No definition available. + Details
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- Definition Public Utilities, Contract Extension + References No definition available. + Details
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- Definition Public Utilities, Eliminated Recovery of Adder Revenue + References No definition available. + Details
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- Definition Public Utilities, Estimated Cost of Mega Watts of Solar Photovoltaic Capacity + References No definition available. + Details
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- Definition Public Utilities, Estimated Increase in Revenue over amendment term + References No definition available. + Details
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- Definition Public Utilities, First Year Cost of Wind Capacity Planned Purchase Agreement + References No definition available. + Details
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- Definition Public Utilities, Frequency of IRP filings + References No definition available. + Details
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- Definition Public Utilities, Increase Annual Transmission Service Revenue + References No definition available. + Details
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- Definition Public Utilities, Number of Mega Watt Hours of Wind Generation + References No definition available. + Details
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- Definition Public Utilities, Number of Mega Watts of Gas-fired Generation + References No definition available. + Details
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- Definition Public Utilities, Number of Mega Watts of Geothermal Capacity + References No definition available. + Details
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- Definition Public Utilities, Number of Mega Watts of Solar Photovoltaic Capacity + References No definition available. + Details
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- Definition Public Utilities, Number of Mega Watts of Wind Energy Capcity + References No definition available. + Details
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- Definition Public Utilities, Number of protests that were filed to IRP requesting rejection of the plan + References No definition available. + Details
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- Definition Public Utilities, Order Disapproved Recovery of Costs As Regulatory Agency Had Not Acted on Specific Procurements Proposed + References No definition available. + Details
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- Definition Public Utilities, Planning Period Covered of IRP + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
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- Definition Public Utilities, Program Costs Related To Energy Efficiency + References No definition available. + Details
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Balance Type: | debit
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- Definition Public Utilities, Proposed Profit Incentive Adder Revenues Related To Energy Efficiency Program + References No definition available. + Details
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Namespace Prefix: | pnm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Public Utilities, Rate Adder Allowed + References No definition available. + Details
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- Definition Public Utilities, Rate Rider Estimated Incentives Under-Recovery + References No definition available. + Details
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- Definition Public Utilities, Rate Rider Incentives Under-Recovery + References No definition available. + Details
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- Definition Public Utilities, Rate Rider Net Over-Recovery + References No definition available. + Details
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- Definition Public Utilities, Rate Rider Program Costs Over-Recovery + References No definition available. + Details
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- Definition Public Utilities, Rate Rider Recovered + References No definition available. + Details
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- Definition Public Utilities, Rate Rider to be Implemented + References No definition available. + Details
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- Definition Reasonable Cost Threshold + References No definition available. + Details
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- Definition Public Utility, Regulatory Costs Approved + References No definition available. + Details
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- Definition Public Utilities, Regulatory Costs Incurred and Eligible For Recovery, Amount Deferred for Collection in Future Period + References No definition available. + Details
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- Definition Public Utilities, Regulatory Costs to be Collected + References No definition available. + Details
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- Definition Public Utilities, Regulatory Rate Increase + References No definition available. + Details
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- Definition Public Utilities, Requested Rider Rate For 2014 + References No definition available. + Details
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- Definition Regulated Operations, Required Percentage of Diversification + References No definition available. + Details
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- Definition Regulated Operations, Required Percentage of Renewable Energy in Portfolio to Electric Sales + References No definition available. + Details
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- Definition Public Utilities, Retention Percentage of Sales Margins + References No definition available. + Details
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- Definition Public Utilities, Return on Equity + References No definition available. + Details
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- Definition Public Utilities, Rider Condition of Earned Return on Jurisdictional Equity in 2013 + References No definition available. + Details
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- Definition Public Utilities, Total Revenue Requirement Increase + References No definition available. + Details
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- Definition Public Utilities, Unapproved 2014 Program Implementation Costs + References No definition available. + Details
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- Definition Public Utilities, Unapproved 2014 Program Implementation Costs, Bonus + References No definition available. + Details
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- Definition Public Utilities, Unapproved 2014 Program Implementation Costs, Expense + References No definition available. + Details
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- Definition Public Utilities, Unapproved 2014 Program Implementation Costs, Overcollection refund + References No definition available. + Details
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- Definition Public Utilities, Wind Capacity Planned Purchase Agreement Term + References No definition available. + Details
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- Details
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- Definition Amount of regulatory costs not yet approved by the regulatory authority. + References No definition available. + Details
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