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Revenue (Tables)

3 Months Ended

Dec. 31, 2024

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

TVA's operating revenues by state for the three months ended December 31, 2024 and 2023, are detailed in the table below:

Operating Revenues By State (in millions)
			Three Months Ended December 31
			2024						2023
Alabama			$	431					$	408
Georgia			74						69
Kentucky			182						177
Mississippi			269						255
North Carolina			21						23
Tennessee			1,886						1,789
Virginia			12						11
Subtotal			2,875						2,732
Off-system sales			1						2
Revenue capitalized during pre-commercial plant operations(1)			—						(3)
Revenue from sales of electricity			2,876						2,731
Other revenue			44						34
Total operating revenues			$	2,920					$	2,765

Note

(1) Represents revenue capitalized during pre-commercial operations at Johnsonville Aeroderivative CT Units 25-28 in the three months ended December 31, 2024 and Paradise CT Units 5-7 in the three months ended December 31, 2023. Revenue capitalized at Johnsonville Aeroderivative was less than $1 million for the three months ended December 31, 2024.

Revenue from External Customers by Products and Services [Table Text Block]

TVA's operating revenues by customer type for the three months ended December 31, 2024 and 2023, are detailed in the table below:

Operating Revenues by Customer Type (in millions)
			Three Months Ended December 31
			2024						2023
Revenue from sales of electricity
Local power companies			$	2,616					$	2,487
Industries directly served			230						217
Federal agencies and other			30						30
Revenue capitalized during pre-commercial plant operations(1)			—						(3)
Revenue from sales of electricity			2,876						2,731
Other revenue			44						34
Total operating revenues			$	2,920					$	2,765

Note

(1) Represents revenue capitalized during pre-commercial operations at Johnsonville Aeroderivative CT Units 25-28 in the three months ended December 31, 2024 and Paradise CT Units 5-7 in the three months ended December 31, 2023. Revenue capitalized at Johnsonville Aeroderivative was less than $1 million for the three months ended December 31, 2024.

Schedule of Long-term Contracts for Purchase of Electric Power

The number of LPCs by contract arrangement, the revenues derived from such arrangements for the three months ended December 31, 2024, and the percentage those revenues comprised of TVA's total operating revenues for the same period, are summarized in the table below:

TVA Local Power Company Contracts At or for the Three Months Ended December 31, 2024
Contract Arrangements(1)						Number of LPCs						Revenue from Sales of Electricity to LPCs (in millions)						Percentage of Total Operating Revenues
20-year termination notice						148						$	2,272					77.8		%
5-year termination notice						5						344						11.8		%
Total						153						$	2,616					89.6		%

Note

(1) Ordinarily, the LPCs and TVA have the same termination notice period; however, in a contract with one of the LPCs with a five-year termination notice, TVA has a 10-year termination notice (which becomes a five-year termination notice if TVA loses its discretionary wholesale rate-setting authority). Certain LPCs have five-year termination notices or a shorter period if any act of Congress, court decision, or regulatory change requires or permits that election.

X

- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References

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-Name Accounting Standards Codification
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- Definition

Tabular disclosure of information concerning the terms and significance of long term contracts to purchase power (generally referred to as purchase power agreements (PPAs) or power sale agreements (PSAs)) including date of contract expiration, share of plant output being purchased, estimated annual cost, annual minimum debt service payment required and amount of related long-term debt or lease obligations outstanding.

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-Topic 980
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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