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Other Income (Expense), Net Other Income (Expense), Net (Tables)
12 Months Ended
Sep. 30, 2021
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 years ended September 30
 202120202019
Bellefonte$(28)$— $21 
Interest income12 18 25 
External services13 12 13 
Gains (losses) on investments16 
Miscellaneous— (3)— 
Total other income (expense), net$13 $36 $62