XML 34 R10.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Inventories, Net | 3 Months Ended
--- | ---
Dec. 31, 2017
Inventory, Net [Abstract] |
Inventories, Net | Inventories, Net The table below summarizes the types and amounts of TVA’s inventories:
Inventories, Net
| At December 31, 2017 |  | At September 30, 2017
Materials and supplies inventory | $ | 758 |  |  | $ | 734 |
Fuel inventory | 322 |  |  | 355 |
Renewable energy certificates/emission allowance inventory, net | 12 |  |  | 15 |
Allowance for inventory obsolescence | (45 | ) |  | (39 | )
Inventories, net | $ | 1,047 |  |  | $ | 1,065 |

X
- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
Name: | us-gaap_InventoryDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InventoryNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration