CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net income	$ 1,936	$ 1,771	$ 1,736
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	2,769	2,471	2,436
Nuclear fuel amortization	106	96	118
Deferred income taxes	225	(59)	(140)
Allowance for equity funds used during construction	(168)	(91)	(75)
Earnings from equity method investments	(19)	(35)	(36)
Dividends from equity method investments	34	35	37
Provision for bad debts	47	79	73
Share-based compensation expense	33	25	20
Changes in operating assets and liabilities:
Accounts receivable	19	(27)	(429)
Accrued unbilled revenues	21	252	(243)
Inventories	(140)	(98)	(203)
Other current assets	(139)	86	(58)
Accounts payable	37	(149)	195
Net regulatory assets and liabilities	436	911	570
Other current liabilities	(317)	200	102
Pension and other employee benefit obligations	(89)	17	(49)
Other, net	(150)	(157)	(122)
Net Cash Provided by (Used in) Operating Activities, Total	4,641	5,327	3,932
Investing activities
Capital/construction expenditures	(7,364)	(5,854)	(4,638)
Purchase of investment securities	(998)	(994)	(1,332)
Proceeds from the sale of investment securities	961	959	1,297
Other, net	(27)	(37)	20
Net Cash Provided by (Used in) Investing Activities, Total	(7,428)	(5,926)	(4,653)
Financing activities
Repayments of short-term borrowings, net	(90)	(28)	(192)
Proceeds from Issuance of Long-term Debt	3,647	2,630	2,164
Repayments of long-term debt	(656)	(1,151)	(601)
Proceeds from Issuance of Common Stock	1,117	270	322
Payments of Dividends	(1,175)	(1,092)	(1,012)
Proceeds from (Payments for) Other Financing Activities	(6)	(12)	(15)
Net Cash Provided by (Used in) Financing Activities, Total	2,837	617	666
Net change in cash and cash equivalents	50	18	(55)
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	129	111	166
Cash and Cash Equivalents, at Carrying Value, Ending Balance	179	129	111
Supplemental disclosure of cash flow information:
Interest Paid, Excluding Capitalized Interest, Operating Activities	(1,131)	(945)	(887)
Income Taxes Paid, Net	588	92	(15)
Other Noncash Investing and Financing Items [Abstract]
Capital Expenditures Incurred but Not yet Paid	964	553	626
Inventory transfers to plant, property and equipment	258	197	78
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	138	238	141
Allowance for equity funds used during construction	168	91	75
Stock Issued	$ 68	$ 64	$ 57