Consolidated Statements of Operations - SPPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total operating revenue	$ 25,150	$ 20,952	$ 19,844
Cost of fuel and energy	5,504	4,187	4,586
Total operating expenses	19,823	16,661	15,694
Operating income	5,327	4,291	4,150
Interest expense	(2,118)	(2,021)	(1,912)
Allowance for equity funds	126	165	173
Interest and dividend income	89	71	117
Other, net	(17)	88	97
Total other income (expense)	(33)	3,180	(1,736)
Income (loss) before income tax expense (benefit) and equity income (loss)	5,294	7,471	2,414
Income tax (benefit) expense	(1,132)	308	(598)
Net income (loss) attributable to parent	5,790	6,943	2,950
SPPC
Total operating revenue	965	854	889
Operations and maintenance	163	162	172
Depreciation and amortization	143	141	125
Property and other taxes	24	23	22
Total operating expenses	798	689	718
Operating income	167	165	171
Interest expense	(54)	(56)	(48)
Allowance for borrowed funds	2	2	1
Allowance for equity funds	7	4	3
Interest and dividend income	9	4	3
Other, net	11	7	1
Total other income (expense)	(25)	(39)	(40)
Income (loss) before income tax expense (benefit) and equity income (loss)	142	126	131
Income tax (benefit) expense	18	15	28
Net income (loss) attributable to parent	124	111	103
SPPC | Regulated electric
Total operating revenue	848	738	770
Cost of fuel and energy	407	301	337
SPPC | Regulated natural gas
Total operating revenue	117	116	119
Cost of fuel and energy	$ 61	$ 62	$ 62