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Construction Program and Jointly-Owned Electric Generating Plants (Tables)
 12 Months Ended
Dec. 31, 2017
Construction Program and Jointly-Owned Electric Generating Plants [Abstract]  
Summary of Interests and Investments in Jointly-Owned Generating Facilities
At December 31, 2017, 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)
$
920,950

 
$
(522,750
)
 
$
8,512

 
46.30
%
PVNGS (Nuclear) (3)
$
918,830

 
$
(353,054
)
 
$
35,038

 
10.20
%
Four Corners Units 4 and 5 (Coal)
$
204,432

 
$
(100,914
)
 
$
61,755

 
13.00
%
Luna (Gas)
$
70,995

 
$
(27,023
)
 
$
(13
)
 
33.33
%
(1) 
Includes cost of removal.
(2) 
See Note 16 for a discussion of the December 2017 shutdown of SJGS Units 2 and 3 and the restructuring of the ownership of SJGS Unit 4.
(3) 
Includes interest in PVNGS Unit 3, interest in common facilities for all PVNGS units, and owned interests in PVNGS Units 1 and 2, including improvements.
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:
 
2018
 
2019
 
2020
 
2021
 
2022
 
Total
 
 
 
 
 
(In millions)
 
 
 
 
PNM
$
295.0

 
$
339.0

 
$
313.4

 
$
315.8

 
$
493.7

 
$
1,756.9

TNMP
185.8

 
170.5

 
170.0

 
170.5

 
170.1

 
866.9

Corporate and Other
19.4

 
17.3

 
17.0

 
17.5

 
17.1

 
88.3

Total PNMR
$
500.2

 
$
526.8

 
$
500.4

 
$
503.8

 
$
680.9

 
$
2,712.1