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Construction Program and Jointly-Owned Electric Generating Plants (Tables) | 12 Months Ended
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Dec. 31, 2016
Construction Program and Jointly-Owned Electric Generating Plants [Abstract] |
Summary of Interests and Investments in Jointly-Owned Generating Facilities | At December 31, 2016, PNM’s interests and investments in jointly-owned generating facilities are:
Station (Fuel Type) | Plant in Service |  | Accumulated Depreciation(1) |  | Construction Work in Progress |  | Composite Interest
| (In thousands)
SJGS (Coal) (2) | $ | 1,082,537 |  |  | $ | (445,597 | ) |  | $ | 4,406 |  |  | 46.30 | %
PVNGS (Nuclear) (3) | $ | 797,793 |  |  | $ | (334,887 | ) |  | $ | 38,946 |  |  | 10.20 | %
Four Corners Units 4 and 5 (Coal) | $ | 188,026 |  |  | $ | (103,584 | ) |  | $ | 52,869 |  |  | 13.00 | %
Luna (Gas) | $ | 69,678 |  |  | $ | (25,386 | ) |  | $ | 259 |  |  | 33.33 | %
(1) | Includes cost of removal.
(2) | As discussed in Note 16, the NMPRC has approved the shutdown of SJGS Units 2 and 3 as of December 31, 2017. At December 31, 2016, PNM’s carrying value for its current ownership share of SJGS Units 2 and 3 included plant in service of $471.8 million and accumulated depreciation and amortization (including cost of removal) of $203.9 million for a net undepreciated net book value of $267.9 million, which amounts are included in the table above. At December 31, 2015, PNM recorded a regulatory disallowance of $127.6 million representing its estimate of the portion of the December 31, 2017 net book value of SJGS Units 2 and 3 that will not be recovered from ratepayers, which is reflected as a reduction of plant in service on the Consolidated Balance Sheets.
(3) | Includes interest in PVNGS Unit 3, interest in common facilities for all PVNGS units, and owned interests in PVNGS Units 1 and 2.
Summary of Budgeted Construction Expenditures | An unaudited summary of the budgeted construction expenditures, including expenditures for jointly-owned projects, and nuclear fuel, is as follows:
| 2017 |  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | Total
|  |  |  |  | (In millions) |  |  |  |
PNM | $ | 308.1 |  |  | $ | 231.0 |  |  | $ | 282.2 |  |  | $ | 252.5 |  |  | $ | 190.7 |  |  | $ | 1,264.5 |
TNMP | 151.0 |  |  | 134.3 |  |  | 137.1 |  |  | 136.2 |  |  | 126.2 |  |  | 684.8 |
Corporate and Other | 58.2 |  |  | 29.7 |  |  | 15.3 |  |  | 15.2 |  |  | 15.4 |  |  | 133.8 |
Total PNMR | $ | 517.3 |  |  | $ | 395.0 |  |  | $ | 434.6 |  |  | $ | 403.9 |  |  | $ | 332.3 |  |  | $ | 2,083.1 |

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- Definition Construction Program and Jointly-Owned Electric Generating Plants [Abstract] + References No definition available. + Details
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- Definition Summary of budgeted construction expenditures [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.C) -URI http://asc.fasb.org/extlink&oid=6500719&loc=d3e659983-123033 + Details
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