Revenues (Tables)

6 Months Ended

Jun. 30, 2023

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

SPS’ operating revenues consisted of the following:

	Three Months Ended June 30
(Millions of Dollars)	2023		2022
Major revenue types
Revenue from contracts with customers:
Residential	$	91	$	100
Commercial and Industrial	257		264
Other	14		13
Total retail	362		377
Wholesale	51		109
Transmission	72		74
Other	2		3
Total revenue from contracts with customers	487		563
Alternative revenue and other	9		95
Total revenues	$	496	$	658
	Six Months Ended June 30
(Millions of Dollars)	2023		2022
Major revenue types
Revenue from contracts with customers:
Residential	$	192	$	197
Commercial and Industrial	524		486
Other	26		21
Total retail	742		704
Wholesale	96		178
Transmission	146		146
Other	2		6
Total revenue from contracts with customers	986		1,034
Alternative revenue and other	18		101
Total revenues	$	1,004	$	1,135