Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net income	$ 160	$ 182
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	340	310
Deferred income taxes	(3)	9
Pension and other postretirement benefits	4	7
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax	0	(11)
Allowance for equity funds used during construction	(12)	(10)
Decoupling mechanism deferrals, net of amortization	(6)	(5)
2020 Labor Day wildfire earnings test reserve	0	15
Other non-cash income and expenses, net	46	41
Changes in working capital:
Decrease in accounts receivable, net	23	(21)
(Increase) in inventories	(14)	(14)
(Increase)/decrease in margin deposits	87	(8)
(Decrease) in accounts payable and accrued liabilities	(181)	80
Increase (Decrease) in Other Accounts Payable and Accrued Liabilities	(133)	44
Other working capital items, net	20	24
Other, net	(27)	(33)
Net cash provided by operating activities	331	574
Cash flows from investing activities:
Capital expenditures	(931)	(541)
Sales of Nuclear decommissioning trust securities	1	3
Purchases of Nuclear decommissioning trust securities	(1)	(3)
Proceeds from Sale of Property, Plant, and Equipment	2	13
Other, net	(3)	0
Net cash used in investing activities	(932)	(528)
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments on long-term debt	(260)	0
Proceeds from Issuance of long-term debt	400	0
Issuance of commercial paper, net	0	40
Proceeds from failed sale-leaseback transactions	0	25
Dividends paid	(131)	(117)
Repurchase of common stock	0	(18)
Other	(11)	(10)
Net cash provided by (used in) financing activities	483	(80)
Increase (Decrease) in cash and cash equivalents	(118)	(34)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	47	18
Supplemental cash flow information is as follows:
Cash paid for interest, net of amounts capitalized	91	81
Cash paid for income taxes, net	25	18
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	0	29
Proceeds from Issuance or Sale of Equity	485
Increase (Decrease) in Other Regulatory Assets	10	(44)
Increase (Decrease) in Regulatory Liabilities	$ 17	8
Common Stock Including Additional Paid in Capital [Member]
Supplemental cash flow information is as follows:
Proceeds from Issuance or Sale of Equity		$ 0