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Other Income (Expense), Net (Tables)
9 Months Ended
Jun. 30, 2016
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 
 
Three Months Ended
June 30
 
Nine Months Ended
June 30
 
 
2016
 
2015
 
2016
 
2015
 
External services
$
2

 
$
3

 
$
9

 
$
9

 
Interest income
6

 
6

 
19

 
18

 
Gains (losses) on investments
1

 

 
4

 
3

 
Miscellaneous

 
(1
)
 
(3
)
 
(5
)
 
Total other income (expense), net
$
9

 
$
8

 
$
29

 
$
25