Revenues

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue

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

	Three Months Ended Sept. 30
(Millions of Dollars)	2022		2021
Major revenue types
Revenue from contracts with customers:
Residential	$	159	$	126
Commercial and Industrial	325		241
Other	17		11
Total retail	501		378
Wholesale	149		109
Transmission	80		75
Other	—		2
Total revenue from contracts with customers	730		564
Alternative revenue and other	11		11
Total revenues	$	741	$	575
	Nine Months Ended Sept. 30
(Millions of Dollars)	2022		2021
Major revenue types
Revenue from contracts with customers:
Residential	$	356	$	302
Commercial and Industrial	811		631
Other	38		30
Total retail	1,205		963
Wholesale	327		785
Transmission	226		218
Other	6		6
Total revenue from contracts with customers	1,764		1,972
Alternative revenue and other	112		35
Total revenues	$	1,876	$	2,007