v3.26.3
Segment Information
 9 Months Ended
Sep. 30, 2026
Segment Reporting [Abstract]  
Segment Information
Segment information and reconciliation to NSP-Wisconsin's consolidated net income:
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.
Asset and capital expenditure information is not provided for NSP-Wisconsin's reportable segments. As an integrated electric and natural gas utility, NSP-Wisconsin operates significant assets that are not dedicated to a specific business segment. Reporting assets and capital expenditures by business segment would require arbitrary and potentially misleading allocations, which may not necessarily reflect the assets that would be required for the operation of the business segments on a stand-alone basis.
Certain costs, such as common depreciation, common O&M expenses and interest expense are allocated based on cost causation allocators across each segment. In addition, a general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising.
Other segment expenses, net, for the reportable segments includes conservation and DSM expenses, taxes (other than income taxes), other income, net intersegment expenses and AFUDC - equity.