v3.26.1
Revenues (Tables)
 6 Months Ended
Jun. 30, 2026
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue
Revenue is classified by the type of goods/services rendered and market/customer type. NSP-Wisconsin’s operating revenues consisted of the following:
Three Months Ended June 30, 2026
(Millions of Dollars)ElectricNatural GasTotal
Major revenue types
Revenue from contracts with customers:
Residential$69 $13 $82 
C&I120 9 129 
Other2 — 2 
Total retail191 22 213 
Interchange and other63 2 65 
Total revenue from contracts with customers254 24 278 
Alternative revenue and other3 1 4 
Total revenues$257 $25 $282 
Three Months Ended June 30, 2025
(Millions of Dollars)ElectricNatural GasTotal
Major revenue types
Revenue from contracts with customers:
Residential$71 $13 $84 
C&I123 9 132 
Other1 — 1 
Total retail195 22 217 
Interchange and other57 2 59 
Total revenue from contracts with customers252 24 276 
Alternative revenue and other1 — 1 
Total revenues$253 $24 $277 
Six Months Ended June 30, 2026
(Millions of Dollars)ElectricNatural GasTotal
Major revenue types
Revenue from contracts with customers:
Residential$165 $58 $223 
C&I248 44 292 
Other4 — 4 
Total retail417 102 519 
Interchange and other132 4 136 
Total revenue from contracts with customers549 106 655 
Alternative revenue and other6 2 8 
Total revenues$555 $108 $663 
Six Months Ended June 30, 2025
(Millions of Dollars)ElectricNatural GasTotal
Major revenue types
Revenue from contracts with customers:
Residential$152 $51 $203 
C&I237 37 274 
Other3 — 3 
Total retail392 88 480 
Interchange and other116 3 119 
Total revenue from contracts with customers508 91 599 
Alternative revenue and other4 1 5 
Total revenues$512 $92 $604