v3.26.3
Segment Reporting (Tables)
 9 Months Ended
Sep. 30, 2026
Segment Reporting [Abstract]  
Segment Reporting :
Three Months Ended Sept. 30, 2026
(Millions of Dollars)Regulated electric utilityRegulated natural gas utilityTotal segments
Operating revenues (a)
$330 $19 $349 
Electric fuel and purchased power119 — 119 
Cost of natural gas sold and transported— 7 7 
O&M expenses65 8 73 
Depreciation and amortization47 9 56 
Other segment expenses, net
5 — 5 
Interest charges and financing costs20 2 22 
Income tax expense (benefit)18 (2)16 
Net income (loss)$56 $(5)$51 
Total segment net income$51 
Non-segment net income2 
Consolidated net income$53 
(a)Operating revenues include $72 million of affiliate electric revenue.

Three Months Ended Sept. 30, 2025
(Millions of Dollars)Regulated electric utilityRegulated natural gas utilityTotal segments
Operating revenues (a)
$291 $18 $309 
Electric fuel and purchased power118 — 118 
Cost of natural gas sold and transported— 6 6 
O&M expenses52 6 58 
Depreciation and amortization43 8 51 
Other segment expenses, net
5 1 6 
Interest charges and financing costs16 3 19 
Income tax expense (benefit)13 (2)11 
Net income (loss)$44 $(4)$40 
Total segment net income$40 
Non-segment net income3 
Consolidated net income$43 
(a)Operating revenues include $59 million of affiliate electric revenue.
Nine Months Ended Sept. 30, 2026
(Millions of Dollars)Regulated electric utilityRegulated natural gas utilityTotal segments
Operating revenues (a)
$885 $127 $1,012 
Intersegment revenue— (1)(1)
Total segment revenues885 126 1,011 
Electric fuel and purchased power302 — 302 
Cost of natural gas sold and transported— 58 58 
O&M expenses180 24 204 
Depreciation and amortization140 24 164 
Other segment expenses, net
17 2 19 
Interest charges and financing costs54 7 61 
Income tax expense 46 2 48 
Net income $146 $9 $155 
Total segment net income$155 
Non-segment net income2 
Consolidated net income$157 
(a)Operating revenues include $204 million of affiliate electric revenue.
Nine Months Ended Sept. 30, 2025
(Millions of Dollars)Regulated electric utilityRegulated natural gas utilityTotal segments
Operating revenues (a)
$803 $110 $913 
Electric fuel and purchased power327 — 327 
Cost of natural gas sold and transported— 48 48 
O&M expenses158 23 181 
Depreciation and amortization127 23 150 
Other segment expenses, net
16 2 18 
Interest charges and financing costs44 6 50 
Income tax expense 29 2 31 
Net income $102 $6 $108 
Total segment net income$108 
Non-segment net income3 
Consolidated net income$111 
(a)Operating revenues include $170 million of affiliate electric revenue.