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Other Income (Expense), Net
6 Months Ended
Mar. 31, 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
March 31
Six Months Ended
March 31
 2021202020212020
Interest income$$$$10 
External services
Gains (losses) on investments(11)11 (6)
Miscellaneous
Total Other income (expense), net$11 $(1)$26 $11