CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating activities
Net income	$ 695	$ 727	$ 660
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	929	854	754
Deferred income taxes	(138)	(10)	21
Allowance for equity funds used during construction	(39)	(32)	(28)
Provision for bad debts	34	38	26
Changes in operating assets and liabilities:
Accounts receivable	36	(227)	(58)
Accrued unbilled revenues	158	(169)	(52)
Inventories	(14)	(86)	(71)
Other current assets	22	12	(23)
Accounts payable	(107)	183	66
Net regulatory assets and liabilities	270	82	(526)
Other current liabilities	97	8	30
Pension and other employee benefit obligations	11	(13)	(53)
Other, net	0	(112)	(19)
Net cash provided by operating activities	1,954	1,255	727
Investing activities
Utility capital/construction expenditures	(2,360)	(1,880)	(1,604)
Investments in utility money pool arrangement	(367)	(45)	(273)
Repayments from utility money pool arrangement	367	45	273
Net cash used in investing activities	(2,360)	(1,880)	(1,604)
Financing activities
Proceeds from short-term borrowings, net	26	146	11
Borrowings under utility money pool arrangement	781	1,199	743
Repayments under utility money pool arrangement	(730)	(1,199)	(800)
Proceeds from issuance of long-term debt	834	686	737
Repayments of long-term debt	(250)	(300)	0
Capital contributions from parent	400	569	650
Dividends paid to parent	(652)	(491)	(467)
Net cash provided by financing activities	409	610	874
Net change in cash and cash equivalents	3	(15)	(3)
Cash, cash equivalents and restricted cash at beginning of period	10	25	28
Cash, cash equivalents and restricted cash at end of period	13	10	25
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(271)	(250)	(230)
Cash paid for income taxes, net	(126)	(79)	(14)
Supplemental disclosure of non-cash investing and financing transactions:
Accrued property, plant and equipment additions	248	233	157
Inventory transfers to property, plant and equipment	75	12	10
Operating lease right-of-use assets	18	140	0
Allowance for equity funds used during construction	$ 39	$ 32	$ 28