Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Activities
Net Income	$ 1,397	$ 1,083	$ 903
Adjustments to reconcile Net Income to Net cash from operating activities:
Depreciation and amortization	1,606	1,468	1,459
Nuclear fuel amortization	59	42	58
Allowance for equity funds used during construction	(42)	(29)	(27)
Deferred income taxes	181	44	(32)
Equity (earnings) losses of equity method investees	(3)	14	(97)
Dividends from equity method investees	3	4	79
Loss on extinguishment of debt	0	0	393
Asset (gains) losses and impairments, net	16	(5)	50
Changes in assets and liabilities:
Accounts receivable, net	398	(352)	(146)
Inventories	(110)	(98)	(153)
Prepaid postretirement benefit costs	(62)	107	(117)
Accounts payable	(306)	109	308
Accrued pension liability	(28)	39	(458)
Accrued postretirement liability	14	(71)	(49)
Derivative assets and liabilities	(321)	65	187
Regulatory assets and liabilities	594	(766)	862
Other current and noncurrent assets and liabilities	(176)	323	(153)
Net cash from operating activities	3,220	1,977	3,067
Investing Activities
Plant and equipment expenditures — utility	(3,872)	(3,311)	(3,633)
Plant and equipment expenditures — non-utility	(62)	(67)	(139)
Proceeds from sale of assets	3	24	3
Proceeds from sale of nuclear decommissioning trust fund assets	681	879	1,047
Investment in nuclear decommissioning trust funds	(678)	(878)	(1,046)
Distributions from equity method investees	25	16	18
Contributions to equity method investees	(27)	(13)	(8)
Notes receivable	(86)	(30)	(74)
Other	(79)	(51)	(31)
Net cash used for investing activities	(4,095)	(3,431)	(3,863)
Financing Activities
Issuance of long-term debt, net of discount and issuance costs	3,167	2,171	4,457
Redemption of long-term debt	(1,616)	(1,587)	(3,522)
Short-term borrowings, net	121	404	720
Issuance of common stock	0	1,300	0
Repurchase of common stock	0	(55)	(66)
Dividends paid on common stock	(752)	(685)	(791)
Contributions from noncontrolling interests	2	3	44
Distributions to noncontrolling interests	(1)	(7)	(45)
Prepayment costs for extinguishment of long-term debt	0	0	(361)
Transfer of cash to DT Midstream at separation	0	0	(37)
Other	(38)	(82)	(84)
Net cash from financing activities	883	1,462	315
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	8	8	(481)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	43	35	516
Cash, Cash Equivalents, and Restricted Cash at End of Period	51	43	35
Supplemental disclosure of cash information
Cash paid (received) for: Interest, net of interest capitalized	751	638	671
Cash paid (received) for: Income taxes	(5)	(3)	(3)
Supplemental disclosure of non-cash investing and financing activities
Plant and equipment expenditures in accounts payable	490	435	353
Separation of DT Midstream net assets, excluding cash transferred	$ 0	$ 0	$ 3,973