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Debt and Other Obligations (Tables)
6 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Debt Outstanding
Total debt outstanding at March 31, 2023, and September 30, 2022, consisted of the following:
Debt Outstanding 
(in millions)
 At March 31, 2023At September 30, 2022
Short-term debt  
Short-term debt, net of discounts$572 $1,172 
Current maturities of power bonds issued at par29 29 
Current maturities of long-term debt of VIEs issued at par35 39 
Total current debt outstanding, net636 1,240 
Long-term debt  
Long-term power bonds(1)
18,997 17,950 
Long-term debt of VIEs, net951 968 
Unamortized discounts, premiums, issue costs, and other(132)(124)
Total long-term debt, net19,816 18,794 
Total debt outstanding$20,452 $20,034 
Note
(1) Includes net exchange gain from currency transactions of $103 million and $150 million at March 31, 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 March 31, 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 BDecember 2022$
Total redemptions/maturities of power bonds
Debt of variable interest entities22 
Total redemptions/maturities of debt$23 
Notes
(1) The 2023 Series A Bonds were issued at 99.187 percent of par.
(2) All redemptions were at 100 percent of par.