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Other Income (Expense), Net
9 Months Ended
Jun. 30, 2021
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 
 Three Months Ended June 30Nine Months Ended June 30
 2021202020212020
Interest income$$$$14 
External services10 
Gains (losses) on investments10 16 
Miscellaneous— — — 
Total Other income (expense), net$11 $16 $37 $27