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Inventories, Net
12 Months Ended
Sep. 30, 2013
Inventory, Net [Abstract]  
Inventories, Net
Inventories, Net

The table below summarizes the types and amounts of TVA’s inventories:

Inventories, Net 
At September 30
 
2013
 
2012
Materials and supplies inventory
$
620

 
$
605

Fuel inventory
494

 
508

Emission allowance inventory
14

 
12

Allowance for inventory obsolescence
(37
)
 
(28
)
Inventories, net
$
1,091

 
$
1,097