Revenues

12 Months Ended

Dec. 31, 2024

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:

	Year Ended Dec. 31, 2024
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	283	$	73	$	—	$	356
C&I	468		54		—		522
Other	7		—		1		8
Total retail	758		127		1		886
Interchange and other	225		6		—		231
Total revenue from contracts with customers	983		133		1		1,117
Alternative revenue and other	12		2		—		14
Total revenues	$	995	$	135	$	1	$	1,131

	Year Ended Dec. 31, 2023
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	299	$	84	$	—	$	383
C&I	494		65		—		559
Other	7		—		1		8
Total retail	800		149		1		950
Interchange and other	207		5		—		212
Total revenue from contracts with customers	1,007		154		1		1,162
Alternative revenue and other	12		3		—		15
Total revenues	$	1,019	$	157	$	1	$	1,177

	Year Ended Dec. 31, 2022
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	293	$	103	$	—	$	396
C&I	485		87		—		572
Other	7		—		—		7
Total retail	785		190		—		975
Interchange and other	206		4		—		210
Total revenue from contracts with customers	991		194		—		1,185
Alternative revenue and other	11		4		1		16
Total revenues	$	1,002	$	198	$	1	$	1,201