Revenues

9 Months Ended

Sep. 30, 2020

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, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	70.5	$	7.4	$	—	$	77.9
C&I	119.3		5.7		—		125.0
Other	1.0		—		0.1		1.1
Total retail	190.8		13.1		0.1		204.0
Interchange	41.0		—		—		41.0
Other	0.7		0.9		—		1.6
Total revenue from contracts with customers	232.5		14.0		0.1		246.6
Alternative revenue and other	3.4		0.5		—		3.9
Total revenues	$	235.9	$	14.5	$	0.1	$	250.5

	Three Months Ended Sept. 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	63.6	$	6.9	$	—	$	70.5
C&I	116.6		6.1		—		122.7
Other	0.9		—		0.1		1.0
Total retail	181.1		13.0		0.1		194.2
Interchange	44.7		—		—		44.7
Other	0.3		1.0		—		1.3
Total revenue from contracts with customers	226.1		14.0		0.1		240.2
Alternative revenue and other	2.9		0.6		—		3.5
Total revenues	$	229.0	$	14.6	$	0.1	$	243.7

	Nine Months Ended Sept. 30, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	195.1	$	42.5	$	—	$	237.6
C&I	312.9		32.0		—		344.9
Other	4.6		—		0.3		4.9
Total retail	512.6		74.5		0.3		587.4
Interchange	123.4		—		—		123.4
Other	1.3		2.8		—		4.1
Total revenue from contracts with customers	637.3		77.3		0.3		714.9
Alternative revenue and other	9.8		1.4		—		11.2
Total revenues	$	647.1	$	78.7	$	0.3	$	726.1

	Nine Months Ended Sept. 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	185.1	$	51.3	$	—	$	236.4
C&I	320.2		40.5		—		360.7
Other	4.5		—		0.3		4.8
Total retail	509.8		91.8		0.3		601.9
Interchange	132.3		—		—		132.3
Other	0.9		3.0		—		3.9
Total revenue from contracts with customers	643.0		94.8		0.3		738.1
Alternative revenue and other	8.9		1.8		—		10.7
Total revenues	$	651.9	$	96.6	$	0.3	$	748.8