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Other Income (Expense), Net
 9 Months Ended
Jun. 30, 2013
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
 
2013
 
2012
 
2013
 
2012
External services
$
6

 
$
—

 
$
17

 
$
2

Interest income
5

 
27

 
17

 
14

Gains (losses) on investments
—

 
(1
)
 
2

 
3

Miscellaneous
(1
)
 
(5
)
 
—

 
(3
)
Total other income (expense), net
$
10

 
$
21

 
$
36

 
$
16