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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Operating activities    
Net income $ 1,362 $ 1,357
Adjustments to reconcile net income to cash provided by operating activities:    
Depreciation and amortization 1,824 1,821
Nuclear fuel amortization 84 91
Deferred income taxes (173) (85)
Allowance for equity funds used during construction (63) (53)
Earnings from equity method investments (27) (27)
Dividends from equity method investments 26 30
Provision for bad debts 58 41
Share-based compensation expense 17 19
Changes in operating assets and liabilities:    
Accounts receivable 95 (221)
Accrued unbilled revenues 375 69
Inventories 73 (272)
Other current assets 104 13
Accounts payable (226) 152
Net regulatory assets and liabilities 771 239
Other current liabilities 183 51
Pension and other employee benefit obligations (35) (59)
Other, net (95) 1
Net cash provided by operating activities 4,353 3,167 Close
Investing activities    
Capital/construction expenditures (4,240) (3,325)
Purchase of investment securities (704) (1,055)
Proceeds from the sale of investment securities 678 1,029
Other, net (26) 30
Net cash used in investing activities (4,292) (3,321) Close
Financing activities    
Repayments of short-term borrowings, net (813) (847)
Proceeds from issuances of long-term debt 2,631 2,164
Repayments of long-term debt, including reacquisition premiums (651) (600)
Proceeds from issuance of common stock 83 156
Dividends paid (814) (754)
Other, net (14) (14)
Net cash provided by financing activities 422 105 Close
Net change in cash, cash equivalents and restricted cash 483 (49) Close
Cash, cash equivalents and restricted cash at beginning of period 111 166
Cash, cash equivalents and restricted cash at end of period 594 117
Supplemental disclosure of cash flow information:    
Cash paid for interest (net of amounts capitalized) (652) (628)
Cash paid for income taxes, net (68) (16)
Supplemental disclosure of non-cash investing and financing transactions:    
Accrued property, plant and equipment additions 409 393
Inventory transfers to property, plant and equipment 42 34
Operating lease right-of-use assets 73 17
Allowance for equity funds used during construction 63 53
Issuance of common stock for reinvested dividends and/or equity awards $ 46 $ 40