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Commitments and Contingencies (Tables) | 12 Months Ended
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Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract] |
Unfunded loan commitments | At September 30, 2021, TVA's commitments under unfunded loan commitments were $4 million for 2022. TVA has no commitments under unfunded loan commitments for 2023 through 2026.

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- Definition Unfunded loan commitments [Table Text Block] + References No definition available. + Details
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