XML 98 R12.htm IDEA: XBRL DOCUMENT v3.20.2
Inventories, Net
12 Months Ended
Sep. 30, 2020
Inventory, Net [Abstract]  
Inventories, Net
4.  Inventories, Net

The table below summarizes the types and amounts of TVA's inventories:
Inventories, Net 
At September 30
 20202019
Materials and supplies inventory$770 $742 
Fuel inventory253 294 
RECs inventory, net15 16 
Allowance for inventory obsolescence(35)(53)
Inventories, net$1,003 $999