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Other Income (Expense), Net
 12 Months Ended
Sep. 30, 2014
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
 
 
 
 
 
 
 
2014
 
2013
 
2012
Interest income
$
23

 
$
23

 
$
21

External services
19

 
18

 
7

Gains (losses) on investments
6

 
4

 
5

Miscellaneous
1

 
(1
)
 
—

Total other income (expense), net
$
49

 
$
44

 
$
33