v3.26.1
Segment Reporting
 6 Months Ended
Jun. 30, 2026
Segment Reporting [Abstract]  
Segment Reporting
10. Segment Information
Segment information:
Three Months Ended June 30
20262025
(Millions of Dollars)Regulated electric utilityRegulated electric utility
Operating revenues$389 $508 
Electric fuel and purchased power18 158 
O&M expenses85 83 
Depreciation and amortization125 115 
Other segment expenses, net18 22 
Interest charges and financing costs44 45 
Income tax benefit(24)(16)
Net income$123 $101 
Six Months Ended June 30
20262025
(Millions of Dollars)Regulated electric utilityRegulated electric utility
Operating revenues$919 $1,029 
Electric fuel and purchased power216 374 
O&M expenses171 171 
Depreciation and amortization244 227 
Other segment expenses, net35 46 
Interest charges and financing costs90 88 
Income tax benefit(44)(37)
Net income$207 $160 
Other segment expenses, net, includes conservation and DSM expenses, taxes (other than income taxes), other income, net and AFUDC - equity.