Revenues

12 Months Ended

Dec. 31, 2018

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 (subsequent to adoption of the revised revenue guidance) consists of the following:

	Year Ended Dec. 31, 2018
(Millions of Dollars)	Electric		Natural Gas		All Other		Total
Major revenue types
Revenue from contracts with customers:
Residential	$	991.2	$	606.5	$	10.7	$	1,608.4
C&I	1,560.6		223.5		25.3		1,809.4
Other	47.6		—		0.1		47.7
Total retail	2,599.4		830.0		36.1		3,465.5
Wholesale	174.6		—		—		174.6
Transmission	54.2		—		—		54.2
Other	54.9		84.0		—		138.9
Total revenue from contracts with customers	2,883.1		914.0		36.1		3,833.2
Alternative revenue and other	148.1		100.6		4.3		253.0
Total revenues	$	3,031.2	$	1,014.6	$	40.4	$	4,086.2