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Debt and Other Obligations (Tables)

3 Months Ended

6 Months Ended

Mar. 31, 2024

Mar. 31, 2024

Debt Disclosure [Abstract]

Debt Outstanding

Total debt outstanding at March 31, 2024, and September 30, 2023, consisted of the following:

Debt Outstanding  (in millions)
			At March 31, 2024						At September 30, 2023
Short-term debt
Short-term debt, net of discounts			$	819					$	432
Current maturities of power bonds issued at par			1,022						1,022
Current maturities of long-term debt of VIEs issued at par			36						35
Total current debt outstanding, net			1,877						1,489
Long-term debt
Long-term power bonds(1)			17,986						17,970
Long-term debt of VIEs, net			915						933
Unamortized discounts, premiums, issue costs, and other			(120)						(126)
Total long-term debt, net			18,781						18,777
Total debt outstanding			$	20,658					$	20,266

Note

(1) Includes total net exchange gain from currency transactions of $92 million and $109 million at March 31, 2024, and September 30, 2023, respectively.

Debt Securities Activity

Debt Securities Activity

The table below summarizes the long-term debt securities activity for the period from October 1, 2023, to March 31, 2024:

Debt Securities Activity
						Date						Amount (in millions)
Redemptions/Maturities(1)
2009 Series B						December 2023						$	1
Total redemptions/maturities of power bonds												1
Debt of variable interest entities												17
Total redemptions/maturities of debt												$	18

Note

(1) All redemptions were at 100 percent of par.

Summary of Long-Term Credit Facilities

Summary of Long-Term Credit Facilities At March 31, 2024 (in millions)
Maturity Date						Facility Limit						Letters of Credit Outstanding						Cash Borrowings						Availability
February 2025						$	500					$	317					$	—					$	183
March 2026						150						38						—						112
September 2026						1,000						60						—						940
March 2027						1,000						101						—						899
Total						$	2,650					$	516					$	—					$	2,134

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