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Supplemental Cash Flow Information	12 Months Ended
	Sep. 30, 2023
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Interest paid was $1.1 billion for each of 2023, 2022, and 2021. These amounts differ from interest expense in certain years due to the timing of payments. There was no interest capitalized in 2023, 2022, or 2021.     Construction in progress and nuclear fuel expenditures included in Accounts payable and accrued liabilities at September 30, 2023, 2022, and 2021 were $559 million, $510 million, and $539 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the years ended September 30, 2023, 2022, and 2021 as non-cash investing activities. ARO project accruals included in Accounts payable and accrued liabilities at September 30, 2023, 2022, and 2021 were $71 million, $119 million, and $98 million, respectively, and are excluded from the Consolidated Statements of Cash Flows for the years ended September 30, 2023, 2022, and 2021 as non-cash operating activities.     There are no material finance leases that were entered into during the years ended September 30, 2023 and 2022. Excluded from the Consolidated Statements of Cash Flows for the year ended September 30, 2021, were non-cash investing and financing activities of $233 million related primarily to an increase in lease assets and liabilities incurred for a finance lease that was amended in March 2021. See Note 8 — Leases for further information regarding TVA's finance leases.     Cash flows from swap contracts that are accounted for as hedges are classified in the same category as the item being hedged or on a basis consistent with the nature of the instrument.

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- Definition

The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//230/tableOfContent

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- References

No definition available.

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