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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 521 $ 521
Cash flows from operating activities    
Net income (loss) 149 220
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) 1,093 1,032
Amortization of nuclear fuel cost 176 171
Non-cash retirement benefit expense 124 164
Other regulatory amortization and deferrals 33 69
Changes in current assets and liabilities    
Accounts receivable, net 497 214
Inventories and other current assets, net (235) 79
Accounts payable and accrued liabilities (298) (36)
Accrued interest 14 17
Pension contributions (156) (158)
Other, net (243) 155
Net cash provided by operating activities 1,154 1,459
Cash flows from investing activities    
Construction expenditures (1,199) (1,140)
Nuclear fuel expenditures (229) (173)
Acquisition of leasehold interests in combustion turbine assets (78) 0
Loans and other receivables    
Advances 0 (8)
Repayments 4 9
Other, net 7 22
Net cash used in investing activities (1,495) (1,290)
Long-term debt    
Redemptions and repurchases of power bonds (1) [1] (1)
Repayments of Other Long-term Debt 22 21
Short-term debt issues (redemptions), net (600) (96)
Finance Lease, Principal Payments 25 52
Other, net 2 4
Net cash provided by (used in) financing activities 342 (166)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 1 3
Proceeds from Issuance of Debt 992 0
Payments of Financing Costs (4) $ 0
Cash and cash equivalents at end of period $ 501  
[1]
(1) The 2023 Series A Bonds were issued at 99.187 percent of par.
(2) All redemptions were at 100 percent of par.