Revenues (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

SPS’ operating revenues consists of the following:

	Three Months Ended
(Millions of Dollars)	March 31, 2020		March 31, 2019
Major revenue types
Revenue from contracts with customers:
Residential	$	72.9	$	88.1
C&I	169.1		205.8
Other	7.9		9.6
Total retail	249.9		303.5
Wholesale	73.2		84.8
Transmission	62.6		57.4
Other	0.6		1.0
Total revenue from contracts with customers	386.3		446.7
Alternative revenue and other	8.7		7.4
Total revenues	$	395.0	$	454.1