Revenues

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenues

Revenues

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

	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

	Three Months Ended March 31, 2018
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	227.6	$	227.8	$	2.7	$	458.1
C&I	343.2		86.0		7.2		436.4
Other	12.2		—		—		12.2
Total retail	583.0		313.8		9.9		906.7
Wholesale	47.9		—		—		47.9
Transmission	12.3		—		—		12.3
Other	18.8		24.9		—		43.7
Total revenue from contracts with customers	662.0		338.7		9.9		1,010.6
Alternative revenue and other	36.3		25.3		1.1		62.7
Total revenues	$	698.3	$	364.0	$	11.0	$	1,073.3