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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Millions
 9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 823 $ 323
Cash flows from operating activities    
Net income (loss) 652 829
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) 1,447 1,402
Amortization of nuclear fuel cost 284 277
Non-cash retirement benefit expense 243 235
Amortization of Regulatory Asset 65 240
Changes in current assets and liabilities    
Accounts receivable, net 376 149
Inventories and other current assets, net (86) (145)
Accounts payable and accrued liabilities (126) (217)
Accrued interest (20) (21)
Pension contributions (230) (232)
Other, net (109) (38)
Net cash provided by operating activities 2,496 2,479
Cash flows from investing activities    
Construction expenditures (1,221) (1,292)
Nuclear fuel expenditures (251) (223)
Loans and other receivables    
Advances (6) (8)
Repayments 5 6
Other, net 6 (16)
Net cash used in investing activities (1,467) (1,533)
Long-term debt    
Redemptions and repurchases of power bonds (1,286) [1] (1,034)
Repayments of Other Long-term Debt 20 19
Redemptions of debt of variable interest entities (23) (46)
Short-term debt issues (redemptions), net (145) 196
Payments on leases and leasebacks (44) (41)
Other, net (3) (1)
Net cash provided by (used in) financing activities (528) (945)
Net change in cash and cash equivalents 501 1
Cash and cash equivalents at end of period 800  
Significant non-cash transactions    
Proceeds from Issuance of Debt 997 0
Payments of Financing Costs $ (4) $ 0
[1]
(1) The 2020 Series A Power Bonds were issued at 99.7 percent of par.
(2) All redemptions were at 100 percent of par.