Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 233	$ 244	$ 155
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	417	404	454
Deferred income taxes	6	5	(23)
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity	(14)	(17)	(16)
Pension and other postretirement benefits	13	24	22
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax	(11)	0	0
Decoupling mechanism deferrals, net of amortization	(11)	29	6
(Amortization) Deferral of net benefits due to Tax Reform	0	0	(23)
Share-based Payment Arrangement, Noncash Expense	15	14	11
Increase (Decrease) in Other Operating Liabilities	(5)	(67)	0
Increase (Decrease) in Cash Flow from Deferral of incremental wildfire costs	0	(30)	(15)
2020 Labor Day wildfire earnings test reserve	15	0	0
Increase(Decrease) in Cash Flows from Deferral of wildfire mitigation costs	(28)
Other non-cash income and expenses, net	54	(10)	23
Changes in working capital:
Decrease (increase) in receivables and unbilled revenues	(66)	(64)	(24)
(Increase) in margin deposits	(80)	(29)	8
(Decrease) increase in payables and accrued liabilities	157	61	26
Increase (Decrease) in Contract with Customer, Asset	82	58	0
Other working capital items, net	(22)	(21)	17
Contribution to non-qualified employee benefit trust	(9)	(11)	(11)
Asset Retirement Obligation, Cash Paid to Settle	(27)	(18)	(18)
Other, net	(45)	(40)	(25)
Net cash provided by operating activities	674	532	567
Cash flows from investing activities:
Capital expenditures	(766)	(636)	(784)
Purchases of nuclear decommissioning trust securities	(3)	(10)	(6)
Sales of nuclear decommissioning trust securities	3	12	9
Proceeds from Sale of Property, Plant, and Equipment	13	4	0
Other, net	(5)	(26)	(6)
Net cash used in investing activities	(758)	(656)	(787)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	360	400	549
Payments on long-term debt	0	(160)	(98)
Proceeds from Short-term Debt	0	200	275
Repayments of Short-term Debt	0	(350)	(125)
Proceeds from Other Debt	25	0	0
Dividends paid	(158)	(150)	(140)
Payments for Repurchase of Common Stock	(18)	(12)	0
Other	(12)	(9)	(14)
Net cash used in financing activities	197	(81)	447
(Decrease) increase in cash and cash equivalents	113	(205)	227
Cash and cash equivalents, beginning of year	52	257	30
Cash and cash equivalents, end of year	165	52	257
Supplemental disclosures of cash flow information:
Cash paid for interest, net of amounts capitalized	128	120	113
Cash paid for income taxes	37	16	17
Non-cash investing and financing activities:
Accrued capital additions	111	87	72
Accrued dividends payable	$ 42	$ 40	$ 38