Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from or used in operating activities
Net income	$ 466	$ 540	$ 446
Adjustments to reconcile net income to cash from operating activities:
Depreciation and amortization	422	436	430
Deferred income taxes and investment tax credits	(22)	137	28
Allowance for equity funds used during construction	(19)	(35)	(45)
Deferred recovery clauses	415	(422)	(58)
Regulatory assets and liabilities	116	(100)	(10)
Pension and post-retirement asset and liabilities	(23)	(18)	(10)
Other	14	(1)	23
Changes in working capital:
Receivables, less allowance for credit losses	(44)	(45)	(32)
Inventories	(39)	(41)	(8)
Taxes accrued	12	(23)	(13)
Accounts payable	(56)	75	53
Other	(1)	8	(7)
Cash flows from operating activities	1,241	511	797
Cash flows from or used in investing activities
Capital expenditures	(1,294)	(1,427)	(1,397)
Net proceeds from sale of assets	0	10	0
Cash flows used in investing activities	(1,294)	(1,417)	(1,397)
Cash flows from or used in financing activities
Equity contributions from Parent	300	605	580
Dividends to Parent	(472)	(517)	(450)
Proceeds from long-term debt issuance	0	595	790
Repayment of long-term debt	0	(250)	(279)
Advances to affiliate	(227)	0	0
Repayment of advances to affiliate	956	0	0
Advances from Parent	0	195	0
Repayment of advances from Parent	(195)	0	0
Net change in short-term debt (maturities of 90 days or less)	87	374	(230)
Proceeds from other short-term debt (maturities over 90 days)	400	400	500
Repayment of other short-term debt (maturities over 90 days)	(800)	(500)	(300)
Other financing activities	(1)	0	(3)
Cash flows from financing activities	48	902	608
Net increase (decrease) in cash and cash equivalents	(5)	(4)	8
Cash and cash equivalents at beginning of the year	10
Cash and cash equivalents at beginning of the year	14	18	10
Cash and cash equivalents at end of the year	5	14	18
Supplemental disclosure of cash paid (received):
Interest	233	152	120
Income taxes	102	2	62
Supplemental disclosure of non-cash activities
Change in accrued capital expenditures	20	(6)	25
Reclassification of short-term debt to long-term debt	497	0	0
Change in note receivable from PGS	$ (736)	$ 0	$ 0