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Other Income (Expense), Net (Tables)
3 Months Ended
Dec. 31, 2012
Other Income and Expenses [Abstract]  
Other Income (Expense), Net
Income and expenses not related to TVA’s operating activities are summarized in the following table:

Other Income (Expense), Net 
 
For the Three Months Ended December 31
 
2012
 
2011
External services
$
7

 
$
4

Interest income
6

 
2

Gains (losses) on investments
1

 
1

Miscellaneous
1

 
2

Total other income (expense), net
$
15

 
$
9