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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Operating activities    
Net income $ 1,451 $ 1,472
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 2,216 2,055
Nuclear fuel amortization 87 85
Deferred income taxes 395 406
Allowance for equity funds used during construction (196) (119)
Loss (earnings) from equity method investments 3 (19)
Dividends from equity method investments 16 26
Provision for bad debts 47 47
Share-based compensation expense 38 27
Changes in operating assets and liabilities:    
Accounts receivable (32) 81
Accrued unbilled revenues 66 62
Inventories (202) (71)
Other current assets 142 13
Accounts payable (85) (42)
Net regulatory assets and liabilities (113) 282
Other current liabilities 202 (238)
Pension and other employee benefit obligations (102) (94)
Other, net (59) 4
Net cash provided by operating activities 3,874 3,977
Investing activities    
Capital/construction expenditures (7,470) (5,147)
Purchase of investment securities (854) (693)
Proceeds from the sale of investment securities 851 666
Other, net (19) (23)
Net cash used in investing activities (7,492) (5,197)
Financing activities    
Proceeds (repayments) from short-term borrowings, net 635 (690)
Proceeds from issuances of long-term debt 4,883 3,643
Repayments of long-term debt (1,223) (550)
Proceeds from issuance of common stock 1,151 1,109
Dividends paid (954) (871)
Other, net (1) (5)
Net cash provided by financing activities 4,491 2,636
Net change in cash, cash equivalents and restricted cash 873 1,416
Cash, cash equivalents and restricted cash at beginning of period 179 129
Cash, cash equivalents and restricted cash at end of period 1,052 1,545
Supplemental disclosure of cash flow information:    
Cash paid for interest (net of amounts capitalized) (832) (793)
Cash received for income taxes, net; includes proceeds from tax credit transfers 511 484
Supplemental disclosure of non-cash investing and financing transactions:    
Accrued property, plant and equipment additions 1,250 741
Inventory transfers to property, plant and equipment 288 217
Operating lease and finance lease right-of-use assets 1,218 43
Allowance for equity funds used during construction 196 119
Issuance of common stock for reinvested dividends and/or equity awards $ 63 $ 53