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. PSCo’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	$	344.1	$	95.5	$	3.1	$	442.7
C&I	431.2		32.8		4.6		468.6
Other	11.3		—		—		11.3
Total retail	786.6		128.3		7.7		922.6
Wholesale	61.2		—		—		61.2
Transmission	17.8		—		—		17.8
Other	13.7		24.1		—		37.8
Total revenue from contracts with customers	879.3		152.4		7.7		1,039.4
Alternative revenue and other	36.6		4.0		1.1		41.7
Total revenues	$	915.9	$	156.4	$	8.8	$	1,081.1

	Three Months Ended Sept. 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	315.3	$	94.1	$	3.1	$	412.5
C&I	452.4		32.9		5.5		490.8
Other	11.8		—		—		11.8
Total retail	779.5		127.0		8.6		915.1
Wholesale	40.3		—		—		40.3
Transmission	16.4		—		—		16.4
Other	8.3		21.4		—		29.7
Total revenue from contracts with customers	844.5		148.4		8.6		1,001.5
Alternative revenue and other	36.2		5.5		1.1		42.8
Total revenues	$	880.7	$	153.9	$	9.7	$	1,044.3
	Nine Months Ended Sept. 30, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	825.4	$	430.6	$	9.0	$	1,265.0
C&I	1,134.7		149.7		19.4		1,303.8
Other	35.2		—		—		35.2
Total retail	1,995.3		580.3		28.4		2,604.0
Wholesale	150.0		—		—		150.0
Transmission	45.0		—		—		45.0
Other	43.0		77.3		—		120.3
Total revenue from contracts with customers	2,233.3		657.6		28.4		2,919.3
Alternative revenue and other	109.8		16.5		3.3		129.6
Total revenues	$	2,343.1	$	674.1	$	31.7	$	3,048.9
	Nine Months Ended Sept. 30, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	771.9	$	535.6	$	8.4	$	1,315.9
C&I	1,204.7		202.6		20.0		1,427.3
Other	36.1		—		—		36.1
Total retail	2,012.7		738.2		28.4		2,779.3
Wholesale	126.7		—		—		126.7
Transmission	41.4		—		—		41.4
Other	26.4		76.3		—		102.7
Total revenue from contracts with customers	2,207.2		814.5		28.4		3,050.1
Alternative revenue and other	107.6		16.2		3.4		127.2
Total revenues	$	2,314.8	$	830.7	$	31.8	$	3,177.3