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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Summary of Contractual Commitments
millions of dollars
2025
2026
2027
2028
2029
Thereafter
Total
Purchased power
(1)
$
 
307
$
 
277
$
 
368
$
 
368
$
 
369
$
 
4,487
$
 
6,176
Transportation
(2)(3)
 
742
 
545
 
544
 
454
 
412
 
3,228
 
5,925
Capital projects
 
604
 
287
 
24
-
 
-
 
-
 
 
915
Fuel, gas supply and storage
(4)
 
591
 
94
 
21
 
5
-
 
-
 
 
711
Other
 
160
 
95
 
80
 
59
 
59
 
264
 
717
$
 
2,404
$
 
1,298
$
 
1,037
$
 
886
$
 
840
$
 
7,979
$
 
14,444
As detailed below, contractual obligations at December 31, 2024 includes
 
those related to NMGC. On completion of
 
the sale of
NMGC, all remaining future contractual obligations will
 
be transferred to the buyer. For further details on the pending
 
transaction, refer
to note 4.
(1) Annual requirement to purchase electricity production
 
from IPPs or other utilities over varying contract lengths.
(2) Includes $
86
 
million related to NMGC (2025: $
30
 
million, 2026: $
24
 
million, 2027: $
16
 
million, 2028: $
12
 
million, 2029: $
4
 
million).
(3) Purchasing commitments for transportation of
 
fuel and transportation capacity on various pipelines.
 
Includes a commitment of
$
135
 
million related to a gas transportation contract between
 
PGS and SeaCoast through 2040.
(4) Includes $
177
 
million related to NMGC (2025: $
109
 
million, 2026: $
52
 
million, 2027: $
13
 
million, 2028: $
3
 
million)