Consolidated Statements of Cash Flows - SPPC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income attributable to parent	$ 2,721	$ 5,790	$ 6,943
Adjustments to reconcile net income to net cash flows from operating activities:
Allowance for equity funds	(167)	(126)	(165)
Deferred energy	(1,290)	(520)	(62)
Amortization of deferred energy	357	107	(5)
Other changes in regulatory assets and liabilities	(146)	(255)	(348)
Deferred income taxes and investment tax credits, net	(467)	646	1,880
Other, net	59	(57)	(23)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	20	553	(1,318)
Accrued property, income and other taxes, net	397	(489)	(134)
Accounts payable and other liabilities	751	163	501
Net cash flows from operating activities	9,359	8,692	6,224
Cash flows from investing activities:
Capital expenditures	(7,505)	(6,611)	(6,765)
Net cash flows from investing activities	(7,750)	(5,763)	(13,165)
Cash flows from financing activities:
Net repayments of short-term debt	(867)	(276)	(939)
Other, net	(274)	(70)	(162)
Net cash flows from financing activities	(1,006)	(3,131)	7,103
Net change in cash and cash equivalents and restricted cash and cash equivalents	573	(201)	177
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,244	1,445	1,268
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,817	1,244	1,445
SPPC
Cash flows from operating activities:
Net income attributable to parent	118	124	111
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization	149	143	141
Allowance for equity funds	(7)	(7)	(4)
Deferred energy	(267)	(116)	(17)
Amortization of deferred energy	97	29	(14)
Other changes in regulatory assets and liabilities	(1)	(39)	(33)
Deferred income taxes and investment tax credits, net	31	13	12
Other, net	3	(1)	(2)
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(52)	(27)	(81)
Inventories	(14)	12	(19)
Accrued property, income and other taxes, net	(13)	9	9
Accounts payable and other liabilities	65	43	87
Net cash flows from operating activities	109	183	190
Cash flows from investing activities:
Capital expenditures	(351)	(300)	(246)
Net cash flows from investing activities	(351)	(300)	(246)
Cash flows from financing activities:
Proceeds from long-term debt	248	0	30
Repayments of long-term debt	(265)	0	0
Net repayments of short-term debt	(159)	114	45
Net proceeds from affiliate note payable	70	0	0
Dividends paid	(70)	0	(20)
Proceeds from equity contributions	465	0	0
Other, net	(7)	(7)	(5)
Net cash flows from financing activities	282	107	50
Net change in cash and cash equivalents and restricted cash and cash equivalents	40	(10)	(6)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	16	26	32
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 56	$ 16	$ 26