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Inventories, Net (Tables)
3 Months Ended
Dec. 31, 2024
Inventory, Net [Abstract]  
Inventories, Net
The table below summarizes the types and amounts of TVA's inventories:
Inventories, Net
(in millions)
 At December 31, 2024At September 30, 2024
Materials and supplies inventory$954 $931 
Fuel inventory310 286 
Renewable energy certificates/emissions allowance inventory, net10 11 
Allowance for inventory obsolescence(76)(73)
Inventories, net$1,198 $1,155