Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Total operating revenue	$ 25,920	$ 25,602	$ 26,337
Cost of fuel and energy	6,616	7,057	6,757
Total operating expenses	21,574	22,822	21,096
Operating income	4,346	2,780	5,241
Interest expense	(2,716)	(2,415)	(2,216)
Allowance for equity funds	352	267	167
Interest and dividend income	443	412	154
Other, net	86	116	(7)
Total other income (expense)	(1,173)	(819)	(3,828)
Income before income tax expense (benefit) and equity income (loss)	3,173	1,961	1,413
Income tax expense (benefit)	(1,582)	(1,699)	(1,916)
Net income attributable to parent	4,300	3,020	2,721
SPPC
Total operating revenue	1,262	1,431	1,193
Cost of fuel and energy	682	865	666
Operations and maintenance	245	204	189
Depreciation and amortization	181	185	149
Property and other taxes	24	25	24
Total operating expenses	1,132	1,279	1,028
Operating income	130	152	165
Interest expense	(86)	(66)	(58)
Allowance for borrowed funds	7	7	3
Allowance for equity funds	22	14	7
Interest and dividend income	12	22	18
Other, net	10	4	2
Total other income (expense)	(35)	(19)	(28)
Income before income tax expense (benefit) and equity income (loss)	95	133	137
Income tax expense (benefit)	10	16	19
Net income attributable to parent	85	117	118
SPPC | Regulated electric
Total operating revenue	1,080	1,194	1,025
Cost of fuel and energy	561	689	555
SPPC | Regulated natural gas
Total operating revenue	182	237	168
Cost of fuel and energy	$ 121	$ 176	$ 111