Revenues (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

PSCo’s operating revenues consists of the following:

	Three Months Ended March 31, 2020
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	237.5	$	217.4	$	3.1	$	458.0
C&I	352.0		77.8		9.2		439.0
Other	12.2		—		—		12.2
Total retail	601.7		295.2		12.3		909.2
Wholesale	47.3		—		—		47.3
Transmission	13.4		—		—		13.4
Other	14.8		29.8		—		44.6
Total revenue from contracts with customers	677.2		325.0		12.3		1,014.5
Alternative revenue and other	34.6		6.5		1.1		42.2
Total revenues	$	711.8	$	331.5	$	13.4	$	1,056.7

	Three Months Ended March 31, 2019
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	245.1	$	311.4	$	2.5	$	559.0
C&I	367.9		120.3		8.8		497.0
Other	12.5		—		—		12.5
Total retail	625.5		431.7		11.3		1,068.5
Wholesale	57.3		—		—		57.3
Transmission	13.4		—		—		13.4
Other	11.6		31.6		—		43.2
Total revenue from contracts with customers	707.8		463.3		11.3		1,182.4
Alternative revenue and other	33.7		5.8		1.1		40.6
Total revenues	$	741.5	$	469.1	$	12.4	$	1,223.0