CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 520	$ 518	$ 521
Cash flows from operating activities
Net income (loss)	1,108	1,512	1,352
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)	2,076	1,555	1,848
Amortization of nuclear fuel cost	347	383	388
Non-cash retirement benefit expense	328	333	324
Regulatory asset amount expensed	(70)	(72)	(21)
Changes in current assets and liabilities
Accounts receivable, net	(412)	(18)	259
Inventories and other current assets, net	(163)	42	(12)
Accounts payable and accrued liabilities	282	178	(38)
Accrued interest	(7)	(18)	1
Pension contributions	(308)	(306)	(305)
Settlements of asset retirement obligations	(291)	(242)	114
Other, net	(82)	(91)	(46)
Net cash provided by operating activities	2,948	3,256	3,636
Cash flows from investing activities
Construction expenditures	(2,361)	(1,963)	(1,643)
Nuclear fuel expenditures	(283)	(354)	(342)
Purchases of investments	(51)	(50)	(49)
Loans and other receivables
Repayments	15	9	7
Other, net	26	27	20
Net cash used in investing activities	(2,663)	(2,338)	(2,015)
Long-term debt
Issues of power bonds	484	500	997
Redemptions and repurchases of power bonds	(1,028)	(1,860)	(1,427)
Payments on debt of variable interest entities	(43)	(41)	(39)
Redemptions of Notes Payable	0	0	23
Short-term debt issues (redemptions), net	392	723	(865)
Finance Lease, Principal Payments	85	250	55
Financing costs, net	(3)	(2)	(4)
Other, net	0	9	(6)
Net cash (used in) provided by financing activities	(283)	(921)	(1,422)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	2	(3)	199
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	2
Advances on loans receivable	$ (9)	$ (7)	$ (8)

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