Revenues (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

SPS’ operating revenues consists of the following:

	Three Months Ended
(Millions of Dollars)	June 30, 2019		June 30, 2018
Major revenue types
Revenue from contracts with customers:
Residential	$	70.4	$	85.1
C&I	191.4		200.8
Other	9.9		11.3
Total retail	271.7		297.2
Wholesale	72.0		115.6
Transmission	60.0		59.0
Other	0.4		2.9
Total revenue from contracts with customers	404.1		474.7
Alternative revenue and other	6.4		6.6
Total revenues	$	410.5	$	481.3

	Six Months Ended
(Millions of Dollars)	June 30, 2019		June 30, 2018
Major revenue types
Revenue from contracts with customers:
Residential	$	158.5	$	165.2
C&I	397.2		396.5
Other	19.5		21.0
Total retail	575.2		582.7
Wholesale	156.8		208.9
Transmission	117.4		114.6
Other	1.4		10.4
Total revenue from contracts with customers	850.8		916.6
Alternative revenue and other	13.8		12.0
Total revenues	$	864.6	$	928.6