Revenues

6 Months Ended

Jun. 30, 2020

Revenue from Contract with Customer [Abstract]

Revenues

Revenue is classified by the type of goods/services rendered and market/customer type. NSP-Minnesota’s operating revenues consists of the following:

	Three Months Ended June 30, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	329.5	$	38.6	$	7.6	$	375.7
Commercial and industrial	466.9		26.7		—		493.6
Other	8.5		—		1.6		10.1
Total retail	804.9		65.3		9.2		879.4
Wholesale	37.2		—		—		37.2
Transmission	63.5		—		—		63.5
Interchange	106.1		—		—		106.1
Other	6.4		2.0		—		8.4
Total revenue from contracts with customers	1,018.1		67.3		9.2		1,094.6
Alternative revenue and other	77.6		7.7		—		85.3
Total revenues	$	1,095.7	$	75.0	$	9.2	$	1,179.9

	Three Months Ended June 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	288.1	$	40.9	$	7.1	$	336.1
Commercial and industrial	519.5		32.0		—		551.5
Other	7.6		—		1.3		8.9
Total retail	815.2		72.9		8.4		896.5
Wholesale	53.1		—		—		53.1
Transmission	55.3		—		—		55.3
Interchange	116.2		—		—		116.2
Other	3.9		1.8		—		5.7
Total revenue from contracts with customers	1,043.7		74.7		8.4		1,126.8
Alternative revenue and other	53.5		4.7		—		58.2
Total revenues	$	1,097.2	$	79.4	$	8.4	$	1,185.0

	Six Months Ended June 30, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	629.6	$	152.1	$	15.0	$	796.7
Commercial and industrial	911.6		108.8		—		1,020.4
Other	16.5		—		3.0		19.5
Total retail	1,557.7		260.9		18.0		1,836.6
Wholesale	82.6		—		—		82.6
Transmission	119.4		—		—		119.4
Interchange	215.7		—		—		215.7
Other	8.3		3.3		—		11.6
Total revenue from contracts with customers	1,983.7		264.2		18.0		2,265.9
Alternative revenue and other	147.3		16.9		—		164.2
Total revenues	$	2,131.0	$	281.1	$	18.0	$	2,430.1

	Six Months Ended June 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	615.0	$	190.5	$	14.0	$	819.5
Commercial and industrial	987.0		140.8		—		1,127.8
Other	15.9		—		2.1		18.0
Total retail	1,617.9		331.3		16.1		1,965.3
Wholesale	100.0		—		—		100.0
Transmission	115.7		—		—		115.7
Interchange	236.3		—		—		236.3
Other	8.7		2.9		—		11.6
Total revenue from contracts with customers	2,078.6		334.2		16.1		2,428.9
Alternative revenue and other	97.3		9.3		—		106.6
Total revenues	$	2,175.9	$	343.5	$	16.1	$	2,535.5