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Other Income (Expense), Net
6 Months Ended
Mar. 31, 2025
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
 2025202420252024
Interest income$11 $10 $21 $20 
External services14 
Gains (loss) on investments— (2)14 
Miscellaneous(4)(1)(4)(1)
Total other income, net$12 $18 $29 $41