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Debt and Other Obligations (Tables) | 9 Months Ended
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Jun. 30, 2023
Debt Disclosure [Abstract] |
Debt Outstanding | Total debt outstanding at June 30, 2023, and September 30, 2022, consisted of the following:
Debt Outstanding (in millions)
| At June 30, 2023 |  | At September 30, 2022
Short-term debt |  |  |
Short-term debt, net of discounts | $ | 722 |  |  | $ | 1,172 |
Current maturities of power bonds issued at par | 22 |  |  | 29 |
Current maturities of long-term debt of VIEs issued at par | 35 |  |  | 39 |
Total current debt outstanding, net | 779 |  |  | 1,240 |
Long-term debt |  |  |
Long-term power bonds(1) | 18,990 |  |  | 17,950 |
Long-term debt of VIEs, net | 951 |  |  | 968 |
Unamortized discounts, premiums, issue costs, and other | (129) |  |  | (124) |
Total long-term debt, net | 19,812 |  |  | 18,794 |
Total debt outstanding | $ | 20,591 |  |  | $ | 20,034 |
Note (1) Includes net exchange gain from currency transactions of $89 million and $150 million at June 30, 2023, and September 30, 2022, respectively.
Debt Securities Activity | Debt Securities Activity The table below summarizes the long-term debt securities activity for the period from October 1, 2022, to June 30, 2023:
Debt Securities Activity
|  | Date |  | Amount (in millions) |  |
Issues |  |  |  |  |  |
2023 Series A(1) |  | March 2023 |  | $ | 1,000 |  |  |
Discount on debt issues |  |  |  | (8) |  |  |
Total long-term debt issues |  |  |  | $ | 992 |  |  |
Redemptions/Maturities(2) |  |  |  |  |  |
2009 Series B |  | December 2022 |  | $ | 1 |  |  |
2009 Series B |  | June 2023 |  | 28 |  |  |
Total redemptions/maturities of power bonds |  |  |  | 29 |  |  |
Debt of variable interest entities |  |  |  | 22 |  |  |
Total redemptions/maturities of debt |  |  |  | $ | 51 |  |  |
Notes (1) The 2023 Series A Bonds were issued at 99.187 percent of par. (2) All redemptions were at 100 percent of par.

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