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Inventories, Net (Tables) | 9 Months Ended
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Jun. 30, 2025
Inventory, Net [Abstract] |
Inventories, Net | The table below summarizes the types and amounts of TVA's inventories:
Inventories, Net (in millions)
| At June 30, 2025 |  | At September 30, 2024
Materials and supplies inventory | $ | 980 |  |  | $ | 931 |
Fuel inventory | 280 |  |  | 286 |
Renewable energy certificates/emissions allowance inventory, net | 10 |  |  | 11 |
Allowance for inventory obsolescence | (86) |  |  | (73) |
Inventories, net | $ | 1,184 |  |  | $ | 1,155 |

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