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Commitments and Contingencies (Tables)	12 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Unfunded loan commitments	At September 30, 2022, TVA had no commitments under unfunded loan commitments for 2023. TVA also has no commitments under unfunded loan commitments for 2024 through 2027.

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Unfunded loan commitments [Table Text Block]

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