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v3.20.2

Debt and Other Obligations Debt Outstanding (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Sep. 30, 2019
Short-term debt |  |
Short-term debt, net | $ 777 | $ 922
Current maturities of power bonds | 1,917 | 1,030
Current maturities of long-term debt of variable interest entities | 40 | 39
Current maturities of notes payable | 0 | 23
Total current debt outstanding, net | 2,734 | 2,014
Long-term debt |  |
Long-term power bonds | 18,057 | 19,225
Unamortized discounts, premiums, issues costs, and other | 125 | 131
Total long-term debt, net | 19,001 | 20,183
Total outstanding debt | 21,735 | 22,197
Long-term debt of variable interest entities, net | 1,069 | 1,089
Net exchange gain from currency transaction, current | 83 |
Net exchange gain from currency transaction, noncurrent | 101 | $ 191
Change in long-term debt | $ 1,900 |

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