Revenues (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

NSP-Wisconsin’s operating revenues consisted of the following:

	Three Months Ended June 30, 2021
(Millions of Dollars)	Electric		Natural Gas		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	64	$	15	$	79
C&I	108		15		123
Other	2		—		2
Total retail	174		30		204
Interchange	46		—		46
Other	1		1		2
Total revenue from contracts with customers	221		31		252
Alternative revenue and other	3		—		3
Total revenues	$	224	$	31	$	255

	Three Months Ended June 30, 2020
(Millions of Dollars)	Electric		Natural Gas		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	60	$	10	$	70
C&I	93		7		100
Other	2		—		2
Total retail	155		17		172
Interchange	41		—		41
Other	—		1		1
Total revenue from contracts with customers	196		18		214
Alternative revenue and other	3		1		4
Total revenues	$	199	$	19	$	218

	Six Months Ended June 30, 2021
(Millions of Dollars)	Electric		Natural Gas		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	135	$	46	$	181
C&I	211		39		250
Other	3		—		3
Total retail	349		85		434
Interchange	92		—		92
Other	1		2		3
Total revenue from contracts with customers	442		87		529
Alternative revenue and other	6		1		7
Total revenues	$	448	$	88	$	536

	Six Months Ended June 30, 2020
(Millions of Dollars)	Electric		Natural Gas		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	125	$	35	$	160
C&I	194		26		220
Other	3		—		3
Total retail	322		61		383
Interchange	82		—		82
Other	1		2		3
Total revenue from contracts with customers	405		63		468
Alternative revenue and other	6		1		7
Total revenues	$	411	$	64	$	475