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Other Income (Expense), Net
 9 Months Ended
Jun. 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 Three Months Ended June 30
 
For the Nine Months Ended June 30
 
2012
 
2011
 
2012
 
2011
Interest income
$
27

 
$
2

 
$
14

 
$
6

Gains (losses) on investments
(1
)
 
—

 
3

 
4

External services
—

 
2

 
2

 
13

Miscellaneous
(5
)
 
—

 
(3
)
 
2

Total other income (expense), net
$
21

 
$
4

 
$
16

 
$
25