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Revenue (Tables)

12 Months Ended

Sep. 30, 2024

Revenue from Contract with Customer [Abstract]

Revenues

Revenues

TVA recognizes revenue from contracts with customers to depict the transfer of goods or services to customers in an amount to which the entity expects to be entitled in exchange for those goods or services. For the generation and transmission of electricity, this is generally at the time the power is delivered to a metered customer delivery point for the customer's consumption or distribution. As a result, revenues from power sales are recorded as electricity is delivered to customers. In addition to power sales invoiced and recorded during the month, TVA accrues estimated unbilled revenues for power sales provided to five customers whose billing date occurs prior to the end of the month.  Exchange power sales are presented in the accompanying Consolidated Statements of Operations as a component of sales of electricity. Exchange power sales are sales of excess power after meeting TVA native load and directly served requirements.  Native load refers to the customers on whose behalf a company, by statute, franchise, regulatory requirement, or contract, has undertaken an obligation to serve. TVA engages in other arrangements in addition to power sales. Certain other revenue from activities related to TVA's overall mission is recorded in Other revenue. Revenues that are not related to the overall mission are recorded in Other income, net.

Disaggregation of Revenue [Table Text Block]

TVA's operating revenues by state for each of the last three years are detailed in the table below:

Operating Revenues By State For the years ended September 30 (in millions)
			2024						2023						2022
Alabama			$	1,768					$	1,731					$	1,778
Georgia			295						284						299
Kentucky			776						773						821
Mississippi			1,150						1,146						1,182
North Carolina			89						89						87
Tennessee			7,998						7,819						8,137
Virginia			47						46						48
Subtotal			12,123						11,888						12,352
Off-system sales			8						14						19
Revenue capitalized during pre-commercial plant operations(1)			(3)						(3)						—
Revenue from sales of electricity			12,128						11,899						12,371
Other revenue			186						155						169
Total operating revenues			$	12,314					$	12,054					$	12,540

Note

(1) Represents revenue capitalized during pre-commercial operations at Paradise CTs 5-7 in 2024 and Colbert CTs 9-11 in 2023.

Revenue from External Customers by Products and Services

TVA's operating revenues by customer type for each of the last three years are detailed in the table below:

Operating Revenues by Customer Type For the years ended September 30 (in millions)
			2024						2023						2022
Revenue from sales of electricity
Local power companies			$	11,138					$	10,903					$	11,291
Industries directly served			868						864						926
Federal agencies and other			125						135						154
Revenue capitalized during pre-commercial plant operations(1)			(3)						(3)						—
Revenue from sales of electricity			12,128						11,899						12,371
Other revenue			186						155						169
Total operating revenues			$	12,314					$	12,054					$	12,540

Note

(1) Represents revenue capitalized during pre-commercial operations at Paradise CTs 5-7 in 2024 and Colbert CTs 9-11 in 2023.

Schedule of Long-Term Contracts for Purchase of Electric Power

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

TVA Local Power Company Contracts At or for the year ended September 30, 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						$	9,621					78.1		%
5-year termination notice			5						1,517						12.3		%
Total			153						$	11,138					90.4		%

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.

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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.

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Disclosure of accounting policy for revenue. Includes revenue from contract with customer and from other sources.

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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.

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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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