STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net Income (Loss) Attributable to Parent	$ 384	$ 349	$ 318
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	373	391	303
Deferred income taxes	(133)	17	(47)
Allowance for equity funds used during construction	(7)	(3)	(4)
Provision for bad debts	11	9	6
Changes in operating assets and liabilities:
Accounts receivable	(67)	(67)	(29)
Increase (Decrease) in Accrued Unbilled Revenues	1	(16)	(10)
Inventories	(51)	(19)	(21)
Prepayments and other	39	(50)	16
Accounts payable	(37)	22	4
Net regulatory assets and liabilities	307	(5)	(154)
Other current liabilities	5	52	(1)
Pension and other employee benefit obligations	3	1	(18)
Other, net	(18)	(5)	(4)
Net cash provided by operating activities	810	676	359
Investing activities
Utility capital/construction expenditures	(714)	(578)	(580)
Investments in utility money pool arrangement	0	(176)	(83)
Receipts from utility money pool arrangement	0	176	83
Net cash used in investing activities	(714)	(578)	(580)
Financing activities
Proceeds from (repayments of) short-term borrowings, net	41	(103)	(113)
Proceeds from issuance of long-term debt	98	196	247
Borrowings under utility money pool arrangement	371	336	539
Repayments under utility money pool arrangement	(344)	(427)	(448)
Capital contributions from parent	48	220	301
Dividends paid to parent	(309)	(319)	(310)
Net cash provided by financing activities	(95)	(97)	216
Net change in cash and cash equivalents	1	1	(5)
Cash and cash equivalents at beginning of period	2	1	6
Cash and cash equivalents at end of period	3	2	1
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(127)	(137)	(108)
Cash paid for income taxes, net	(80)	81	21
Supplemental disclosure of non-cash investing transactions:
Accrued property, plant and equipment additions	56	86	37
Inventory transfers to plant, property and equipment	43	10	6
Allowance for Funds Used During Construction, Investing Activities	$ 7	$ 3	$ 4