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Net Completed Plant | 12 Months Ended
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Sep. 30, 2024
Property, Plant and Equipment, Net, by Type [Abstract] |
Property, Plant, and Equipment and Intangible Assets | 6. Net Completed Plant Net completed plant consisted of the following:
Net Completed Plant At September 30 (in millions)
| 2024 |  | 2023
| Cost |  | Accumulated Depreciation |  | Net |  | Cost |  | Accumulated Depreciation |  | Net
Nuclear | $ | 26,800 |  |  | $ | 14,149 |  |  | $ | 12,651 |  |  | $ | 26,803 |  |  | $ | 13,557 |  |  | $ | 13,246 |
Coal-fired(1) | 20,177 |  |  | 16,635 |  |  | 3,542 |  |  | 18,525 |  |  | 14,464 |  |  | 4,061 |
Gas and oil-fired | 7,051 |  |  | 2,112 |  |  | 4,939 |  |  | 6,663 |  |  | 2,057 |  |  | 4,606 |
Transmission | 9,964 |  |  | 3,450 |  |  | 6,514 |  |  | 9,375 |  |  | 3,359 |  |  | 6,016 |
Hydroelectric | 4,307 |  |  | 1,288 |  |  | 3,019 |  |  | 4,109 |  |  | 1,241 |  |  | 2,868 |
Other electrical plant | 1,763 |  |  | 737 |  |  | 1,026 |  |  | 1,798 |  |  | 780 |  |  | 1,018 |
Multipurpose dams | 900 |  |  | 413 |  |  | 487 |  |  | 900 |  |  | 404 |  |  | 496 |
Other stewardship | 27 |  |  | 9 |  |  | 18 |  |  | 26 |  |  | 9 |  |  | 17 |
Total | $ | 70,989 |  |  | $ | 38,793 |  |  | $ | 32,196 |  |  | $ | 68,199 |  |  | $ | 35,871 |  |  | $ | 32,328 |
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 7 — Plant Closures.

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- Definition The entire disclosure for intangible assets and long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/360/tableOfContent + Details
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