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Other Income (Expense), Net
6 Months Ended
Mar. 31, 2024
Other Income and Expenses [Abstract]  
Other Income (Expense), Net Other Income, Net
Income and expenses not related to TVA's operating activities are summarized in the following table:
Other Income, Net
(in millions)
 Three Months Ended March 31Six Months Ended March 31
 2024202320242023
Interest income$10 $$20 $16 
External services
Gains on investments14 10 
Miscellaneous(1)(1)
Total other income, net$18 $21 $41 $37