Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from or used in operating activities
Net income	$ 540	$ 446	$ 424
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	436	430	384
Deferred income taxes and investment tax credits	137	28	54
Allowance for equity funds used during construction	(35)	(45)	(30)
Deferred recovery clauses	(422)	(58)	(40)
Receivables, less allowance for credit losses	(45)	(32)	(10)
Inventories	(41)	(8)	7
Taxes accrued	(23)	(13)	23
Accounts payable	75	53	34
Regulatory assets and liabilities	(100)	(10)	(18)
Other	(11)	6	1
Cash flows from operating activities	511	797	829
Cash flows from or used in investing activities
Capital expenditures	(1,427)	(1,397)	(1,361)
Net proceeds from sale of assets	10	0	6
Cash flows used in investing activities	(1,417)	(1,397)	(1,355)
Cash flows from or used in financing activities
Equity contributions from Parent	605	580	505
Proceeds from long-term debt issuance	595	790	0
Repayment of long-term debt	(250)	(279)	0
Net change in short-term debt (maturities of 90 days or less)	374	(230)	127
Proceeds from other short-term debt (maturities over 90 days)	400	500	300
Repayment of other short-term debt (maturities over 90 days)	(500)	(300)	0
Dividends to Parent	(517)	(450)	(408)
Advances from Parent	195	0	0
Other financing activities	(0)	(3)	(2)
Cash flows from financing activities	902	608	522
Net increase (decrease) in cash and cash equivalents	(4)	8	(4)
Cash and cash equivalents at beginning of the year	18	10	14
Cash and cash equivalents at end of the year	14	18	10
Supplemental disclosure of cash paid (received):
Interest	152	120	126
Income taxes	2	62	14
Supplemental disclosure of non-cash activities
Change in accrued capital expenditures	$ (6)	$ 25	$ 1