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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 521 $ 519
Cash flows from operating activities    
Net income (loss) 476 909
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) 1,551 1,160
Amortization of nuclear fuel cost 252 285
Non-cash retirement benefit expense 246 250
Other regulatory amortization and deferrals (203) (16)
Changes in current assets and liabilities    
Accounts receivable, net (184) 60
Inventories and other current assets, net (131) 26
Accounts payable and accrued liabilities 298 98
Accrued interest (34) (51)
Pension contributions (233) (231)
Other, net (204) 211
Net cash provided by operating activities 1,834 2,227
Cash flows from investing activities    
Construction expenditures (1,772) (1,476)
Nuclear fuel expenditures (235) (243)
Loans and other receivables    
Advances (9) (7)
Repayments 12 6
Other, net 26 22
Net cash used in investing activities (1,978) (1,698)
Long-term debt    
Redemptions and repurchases of power bonds (28) [1] (1,860)
Repayments of Other Long-term Debt 21 20
Short-term debt issues (redemptions), net 254 1,541
Finance Lease, Principal Payments 63 207
Other, net 5 15
Net cash provided by (used in) financing activities 147 (531)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 3 $ (2)
Cash and cash equivalents at end of period $ 501  
[1] (1) All redemptions were at 100 percent of par.