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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 520 $ 521
Cash flows from operating activities    
Net income (loss) 91 476
Adjustments to reconcile net income (loss) to net cash provided by operating activities    
Depreciation and amortization (including amortization of debt issuance costs and premiums/discounts) 1,647 1,551
Amortization of nuclear fuel cost 268 252
Non-cash retirement benefit expense 186 246
Other regulatory amortization and deferrals 26 (203)
Changes in current assets and liabilities    
Accounts receivable, net 401 (184)
Inventories and other current assets, net (190) 131
Accounts payable and accrued liabilities (120) 298
Accrued interest (24) (34)
Pension contributions (231) (233)
Other, net (278) 204
Net cash provided by operating activities 1,776 1,834
Cash flows from investing activities    
Construction expenditures (1,825) (1,772)
Nuclear fuel expenditures (267) (235)
Acquisition of leasehold interests in combustion turbine assets (155) 0
Loans and other receivables    
Advances (7) (9)
Repayments 6 12
Other, net 15 26
Net cash used in investing activities (2,233) (1,978)
Long-term debt    
Redemptions and repurchases of power bonds (29) [1] (28)
Repayments of Other Long-term Debt 22 21
Short-term debt issues (redemptions), net (450) 254
Finance Lease, Principal Payments 36 63
Other, net 6 5
Net cash provided by (used in) financing activities 457 147
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 0 3
Proceeds from Issuance of Debt 992 0
Payments of Financing Costs (4) $ 0
Cash and cash equivalents at end of period $ 500  
[1]
(1) The 2023 Series A Bonds were issued at 99.187 percent of par.
(2) All redemptions were at 100 percent of par.