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Other Income (Expense), Net
 12 Months Ended
Sep. 30, 2012
Other Income and Expenses [Abstract]  
Other Income (Expense), Net
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 years ended September 30
 
 
 
 
 
 
 
2012
 
2011
 
2010
Interest income
$
21

 
$
8

 
$
6

External services
7

 
19

 
7

Gains (losses) on investments
5

 
1

 
3

Miscellaneous
—

 
2

 
8

Total other income (expense), net
$
33

 
$
30

 
$
24