Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total operating revenue	$ 26,337	$ 25,150	$ 20,952
Cost of fuel and energy	6,757	5,504	4,187
Total operating expenses	21,096	19,823	16,661
Operating income	5,241	5,327	4,291
Interest expense	(2,216)	(2,118)	(2,021)
Allowance for equity funds	167	126	165
Interest and dividend income	154	89	71
Other, net	(7)	(17)	88
Total other income (expense)	(3,828)	(33)	3,180
Income (loss) before income tax expense (benefit) and equity income (loss)	1,413	5,294	7,471
Income tax (benefit) expense	(1,916)	(1,132)	308
Net income (loss) attributable to parent	2,721	5,790	6,943
SPPC
Total operating revenue	1,193	965	854
Operations and maintenance	189	163	162
Depreciation and amortization	149	143	141
Property and other taxes	24	24	23
Total operating expenses	1,028	798	689
Operating income	165	167	165
Interest expense	(58)	(54)	(56)
Allowance for borrowed funds	3	2	2
Allowance for equity funds	7	7	4
Interest and dividend income	18	9	4
Other, net	2	11	7
Total other income (expense)	(28)	(25)	(39)
Income (loss) before income tax expense (benefit) and equity income (loss)	137	142	126
Income tax (benefit) expense	19	18	15
Net income (loss) attributable to parent	118	124	111
SPPC | Regulated electric
Total operating revenue	1,025	848	738
Cost of fuel and energy	555	407	301
SPPC | Regulated natural gas
Total operating revenue	168	117	116
Cost of fuel and energy	$ 111	$ 61	$ 62