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Other Long-Term Assets (Tables) | 12 Months Ended
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Sep. 30, 2025
Assets, Noncurrent [Abstract] |
Other Long-Term Assets | The table below summarizes the types and amounts of TVA's other long-term assets:
Other Long-Term Assets At September 30 (in millions) |  |
| 2025 |  | 2024 |  |
Cloud assets | $ | 114 |  |  | $ | 35 |  |  |
Prepaid long-term service agreements | 89 |  |  | 62 |  |  |
Loans and other long-term receivables, net | 83 |  |  | 84 |  |  |
Prepaid capital assets | 81 |  |  | 29 |  |  |
EnergyRight® receivables, net | 45 |  |  | 44 |  |  |
Commodity contract derivative assets | 10 |  |  | 2 |  |  |
Other | 84 |  |  | 88 |  |  |
Total other long-term assets | $ | 506 |  |  | $ | 344 |  |  |

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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