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Supplemental Cash Flow Information
12 Months Ended
Sep. 30, 2022
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information Interest paid was $1.1 billion for each of 2022, 2021, and 2020. These amounts differ from interest expense in certain years due to the timing of payments. There was no interest capitalized in 2022, 2021, or 2020.    Construction in progress and asset retirement obligation project accruals and nuclear fuel expenditures included in Accounts payable and accrued liabilities at September 30, 2022, 2021, and 2020 were $629 million, $637 million, and $398 million, respectively, and are excluded from the Statements of Consolidated Cash Flows for the years ended September 30, 2022, 2021, and 2020 as non-cash investing activities. 
    Excluded from the Statement of Consolidated 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. Excluded from the Statement of Consolidated Cash Flows for the year ended September 30, 2020, as non-cash financing activities, was $394 million related to lease obligations incurred primarily in connection with a PPA. See Note 8 — Leases for further information regarding TVA's finance leases. Also excluded from the Statement of Consolidated Cash Flows for the year ended September 30, 2020, were $80 million and $73 million as non-cash financing and investing activities, respectively, due to derecognition of the Paradise pipeline financing obligation and asset. No material finance leases were entered into during the year ended September 30, 2022.

    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.