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Other Income (Expense), Net Other Income (Expense), Net (Tables)
12 Months Ended
Sep. 30, 2023
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, Net
For the years ended September 30
(in millions)
 202320222021
Bellefonte$— $— $(28)
Interest income34 15 12 
External services15 16 13 
Gains (losses) on investments13 (17)16 
Miscellaneous(1)(7)— 
Total other income, net$61 $$13