Revenues (Tables)

9 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

PSCo’s operating revenues consists of the following:

	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

	Three Months Ended Sept. 30, 2018
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	315.7	$	84.4	$	2.7	$	402.8
C&I	458.5		29.1		4.9		492.5
Other	11.8		—		—		11.8
Total retail	786.0		113.5		7.6		907.1
Wholesale	41.2		—		—		41.2
Transmission	16.3		—		—		16.3
Other	10.6		18.4		—		29.0
Total revenue from contracts with customers	854.1		131.9		7.6		993.6
Alternative revenue and other	40.7		25.3		1.1		67.1
Total revenues	$	894.8	$	157.2	$	8.7	$	1,060.7

	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

	Nine Months Ended Sept. 30, 2018
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	766.1	$	416.2	$	7.9	$	1,190.2
C&I	1,185.4		154.0		17.4		1,356.8
Other	35.4		—		0.1		35.5
Total retail	1,986.9		570.2		25.4		2,582.5
Wholesale	125.3		—		—		125.3
Transmission	41.7		—		—		41.7
Other	44.1		62.1		—		106.2
Total revenue from contracts with customers	2,198.0		632.3		25.4		2,855.7
Alternative revenue and other	111.3		75.5		3.3		190.1
Total revenues	$	2,309.3	$	707.8	$	28.7	$	3,045.8