Consolidated Statements of Cash Flows (Unaudited) - SPPC - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ 989	$ (129)
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Allowance for equity funds	(49)	(38)
Deferred income taxes and investment tax credits, net	(11)	(203)
Net power cost deferrals	(504)	(72)
Amortization of net power cost deferrals	130	47
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	120	333
Accrued property, income and other taxes, net	(177)	(347)
Accounts payable and other liabilities	294	91
Net cash flows from operating activities	1,095	2,221
Cash flows from investing activities:
Capital expenditures	(1,848)	(1,553)
Net cash flows from investing activities	(1,778)	(1,572)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	699	(165)
Other, net	(17)	(240)
Net cash flows from financing activities	20	(310)
Net change in cash and cash equivalents and restricted cash and cash equivalents	(662)	338
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	1,817	1,244
Cash and cash equivalents and restricted cash and cash equivalents at end of period	1,155	1,582
SPPC
Cash flows from operating activities:
Net income (loss)	27	28
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation and amortization	46	36
Allowance for equity funds	(2)	(2)
Other changes in regulatory assets and liabilities	6	(4)
Deferred income taxes and investment tax credits, net	(11)	(3)
Net power cost deferrals	2	(7)
Amortization of net power cost deferrals	42	23
Changes in other operating assets and liabilities, net of effects from acquisitions:
Trade receivables and other assets	(5)	12
Inventories	(4)	(6)
Accrued property, income and other taxes, net	17	7
Accounts payable and other liabilities	(31)	(21)
Net cash flows from operating activities	87	63
Cash flows from investing activities:
Capital expenditures	(104)	(83)
Net cash flows from investing activities	(104)	(83)
Cash flows from financing activities:
Net proceeds from (repayments of) short-term debt	50	(102)
Proceeds from equity contributions	0	130
Repayment of notes payable to affiliates, net	(70)	0
Other, net	(2)	(2)
Net cash flows from financing activities	(22)	26
Net change in cash and cash equivalents and restricted cash and cash equivalents	(39)	6
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	56	16
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 17	$ 22