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Inventories, Net (Tables)
3 Months Ended
Dec. 31, 2014
Inventory, Net [Abstract]  
Inventories, Net
The table below summarizes the types and amounts of TVA’s inventories:
Inventories, Net 
 
At December 31, 2014
 
At September 30, 2014
Materials and supplies inventory
$
621

 
$
616

Fuel inventory
536

 
473

Emission allowance inventory
15

 
13

Allowance for inventory obsolescence
(42
)
 
(46
)
Inventories, net
$
1,130

 
$
1,056