v3.26.3
Revenues
 9 Months Ended
Sep. 30, 2026
Revenue from Contract with Customer [Abstract]  
Revenues
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 Sept. 30, 2026
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$103 $9 $1 $113 
C&I153 8 — 161 
Other2 — — 2 
Total retail258 17 1 276 
Interchange and other69 1 — 70 
Total revenue from contracts with customers327 18 1 346 
Alternative revenue and other3 1 — 4 
Total revenues$330 $19 $1 $350 
Three Months Ended Sept. 30, 2025
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$86 $8 $— $94 
C&I139 9 — 148 
Other2 — 1 3 
Total retail227 17 1 245 
Interchange and other61 1 — 62 
Total revenue from contracts with customers288 18 1 307 
Alternative revenue and other3 — — 3 
Total revenues$291 $18 $1 $310 
Nine Months Ended Sept. 30, 2026
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$268 $67 $1 $336 
C&I401 52 — 453 
Other6 — — 6 
Total retail675 119 1 795 
Interchange and other201 5 — 206 
Total revenue from contracts with customers876 124 1 1,001 
Alternative revenue and other9 3 — 12 
Total revenues$885 $127 $1 $1,013 
Nine Months Ended Sept. 30, 2025
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$238 $59 $— $297 
C&I376 46 — 422 
Other5 — 1 6 
Total retail619 105 1 725 
Interchange and other177 4 — 181 
Total revenue from contracts with customers796 109 1 906 
Alternative revenue and other7 1 — 8 
Total revenues$803 $110 $1 $914