Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 74	$ 60
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	111	99
Deferred income taxes	4	4
Pension and other postretirement benefits	1	3
Allowance for equity funds used during construction	(3)	(3)
Decoupling mechanism deferrals, net of amortization	(3)	(1)
2020 Labor Day wildfire earnings test reserve	0	15
Other non-cash income and expenses, net	10	15
Changes in working capital:
Decrease in accounts receivable, net	34	21
(Increase) in inventories	0	6
(Increase)/decrease in margin deposits	86	23
(Decrease) in accounts payable and accrued liabilities	(174)	(44)
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities	(140)	99
Other working capital items, net	(27)	(27)
Other, net	(14)	(11)
Net cash provided by operating activities	(39)	249
Cash flows from investing activities:
Capital expenditures	(274)	(167)
Sales of Nuclear decommissioning trust securities	0	2
Purchases of Nuclear decommissioning trust securities	0	(2)
Proceeds from Sale of Property, Plant, and Equipment	2	12
Other, net	(4)	1
Net cash used in investing activities	(276)	(154)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments on long-term debt	(260)	0
Proceeds from Issuance of long-term debt	100	0
Issuance of commercial paper, net	68	0
Proceeds from failed sale-leaseback transactions	0	25
Dividends paid	(40)	(38)
Repurchase of common stock	0	(18)
Other	(6)	(6)
Net cash provided by (used in) financing activities	162	(37)
Increase (Decrease) in cash and cash equivalents	(153)	58
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	12	110
Supplemental cash flow information is as follows:
Cash paid for interest, net of amounts capitalized	22	18
Cash paid for income taxes, net	2	2
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	0	29
Proceeds from Issuance or Sale of Equity	300
Increase (Decrease) in Other Regulatory Assets	(6)	(15)
Increase (Decrease) in Regulatory Liabilities	8	5
Common Stock Including Additional Paid in Capital [Member]
Net Cash Provided by (Used in) Financing Activities [Abstract]
Repurchase of common stock		(5)
Supplemental cash flow information is as follows:
Proceeds from Issuance or Sale of Equity	$ 300	$ 0