STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net Income (Loss) Attributable to Parent	$ 349	$ 318	$ 295
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	391	303	298
Deferred income taxes	17	(47)	22
Allowance for equity funds used during construction	(3)	(4)	(33)
Provision for bad debts	9	6	6
Changes in operating assets and liabilities:
Accounts receivable	(67)	(29)	(14)
Increase (Decrease) in Accrued Unbilled Revenues	(16)	(10)	0
Inventories	(19)	(21)	(35)
Prepayments and other	(50)	16	(14)
Accounts payable	22	4	8
Net regulatory assets and liabilities	(5)	(154)	(115)
Other current liabilities	52	(1)	13
Pension and other employee benefit obligations	1	(18)	(16)
Other, net	(5)	(4)	(1)
Net cash provided by operating activities	676	359	414
Investing activities
Utility capital/construction expenditures	(578)	(580)	(1,142)
Investments in utility money pool arrangement	(176)	(83)	(4)
Receipts from utility money pool arrangement	176	83	4
Net cash used in investing activities	(578)	(580)	(1,142)
Financing activities
(Repayments of) proceeds from short-term borrowings, net	(103)	(113)	250
Proceeds from issuance of long-term debt	196	247	343
Borrowings under utility money pool arrangement	336	539	561
Repayments under utility money pool arrangement	(427)	(448)	(561)
Capital contributions from parent	220	301	438
Dividends paid to parent	(319)	(310)	(313)
Net cash provided by financing activities	(97)	216	718
Net change in cash and cash equivalents	1	(5)	(10)
Cash and cash equivalents at beginning of period	1	6	16
Cash and cash equivalents at end of period	2	1	6
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(137)	(108)	(98)
Cash paid for income taxes, net	81	21	10
Supplemental disclosure of non-cash investing transactions:
Accrued property, plant and equipment additions	86	37	99
Inventory transfers to plant, property and equipment	10	6	31
Allowance for Funds Used During Construction, Investing Activities	$ 3	$ 4	$ 33