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Inventories, Net (Tables) | 3 Months Ended
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Dec. 31, 2012
Inventory, Net [Abstract] |
Inventories, Net | The table below summarizes the types and amounts of TVA’s inventories:
Inventories, Net
| At December 31, 2012 |  | At September 30, 2012
Materials and supplies inventory | $ | 608 |  |  | $ | 605 |
Fuel inventory | 504 |  |  | 508 |
Emission allowance inventory | 13 |  |  | 12 |
Allowance for inventory obsolescence | (31 | ) |  | (28 | )
Inventories, net | $ | 1,094 |  |  | $ | 1,097 |

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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