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Net Completed Plant Net Completed Plant (Tables) | 12 Months Ended
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Sep. 30, 2025
Property, Plant and Equipment, Net, by Type [Abstract] |
Net Completed Plant | Net completed plant consisted of the following:
Net Completed Plant At September 30 (in millions)
| 2025 |  | 2024
| Cost |  | Accumulated Depreciation |  | Net |  | Cost |  | Accumulated Depreciation |  | Net
Nuclear | $ | 27,091 |  |  | $ | 14,682 |  |  | $ | 12,409 |  |  | $ | 26,800 |  |  | $ | 14,149 |  |  | $ | 12,651 |
Coal-fired(1) | 19,029 |  |  | 15,760 |  |  | 3,269 |  |  | 20,177 |  |  | 16,635 |  |  | 3,542 |
Gas, oil-fired, and other production | 7,746 |  |  | 2,274 |  |  | 5,472 |  |  | 7,051 |  |  | 2,112 |  |  | 4,939 |
Transmission | 10,323 |  |  | 3,542 |  |  | 6,781 |  |  | 9,964 |  |  | 3,450 |  |  | 6,514 |
Hydroelectric | 4,391 |  |  | 1,352 |  |  | 3,039 |  |  | 4,307 |  |  | 1,288 |  |  | 3,019 |
Other electrical plant | 2,068 |  |  | 678 |  |  | 1,390 |  |  | 1,763 |  |  | 737 |  |  | 1,026 |
Multipurpose dams | 900 |  |  | 419 |  |  | 481 |  |  | 900 |  |  | 413 |  |  | 487 |
Other stewardship | 26 |  |  | 9 |  |  | 17 |  |  | 27 |  |  | 9 |  |  | 18 |
Total | $ | 71,574 |  |  | $ | 38,716 |  |  | $ | 32,858 |  |  | $ | 70,989 |  |  | $ | 38,793 |  |  | $ | 32,196 |
Note (1) TVA recognized accelerated depreciation as a result of the decision to idle or retire certain units and the potential retirement of the remainder of the coal-fired fleet by 2035. See Note 8 — Plant Closures.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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