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Other Income (Expense), Net (Tables)
 3 Months Ended
Dec. 31, 2015
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 
 
For the Three Months Ended
December 31
 
2015
 
2014
Interest income
$
6

 
$
6

External services
4

 
3

Gains (losses) on investments
3

 
1

Miscellaneous
(1
)
 
(1
)
Total other income (expense), net
$
12

 
$
9