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Commitments and Contingencies (Tables)	12 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Unfunded loan commitments	At September 30, 2024, TVA had no commitments under unfunded loan commitments for 2025 through 2029.

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- Definition

Unfunded loan commitments [Table Text Block]

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No definition available.

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