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Net Completed Plant
12 Months Ended
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)
 20242023
 CostAccumulated Depreciation 
Net
CostAccumulated DepreciationNet
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-fired7,051 2,112 4,939 6,663 2,057 4,606 
Transmission9,964 3,450 6,514 9,375 3,359 6,016 
Hydroelectric4,307 1,288 3,019 4,109 1,241 2,868 
Other electrical plant1,763 737 1,026 1,798 780 1,018 
Multipurpose dams900 413 487 900 404 496 
Other stewardship27 18 26 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.