Other long-term liabilities consist primarily of liabilities related to certain derivative agreements as well as liabilities related to operating leases. The table below summarizes the types and amounts of Other long-term liabilities:


Other Long-Term Liabilities At September 30 (in millions)
	2024		2023(1)
Interest rate swap liabilities	$	792	$	627
Environmental compliance and remediation costs	212		—
Long-term project cost accruals	140		10
Currency swap liabilities	109		131
Operating lease liabilities	88		93
Commodity contract derivative liabilities	64		52
Advances for construction	55		56
EnergyRight® financing obligation	52		55
Long-term deferred compensation	50		41
Long-term deferred revenue	48		45

Other	102		101
Total other long-term liabilities	$	1,712	$	1,211

Note

(1) At September 30, 2023, $10 million previously classified as Other (a component of Other long-term liabilities) has been reclassified to Long-term project cost accruals (a component of Other long-term liabilities) to conform with current year presentation.

Interest Rate Swap Liabilities. TVA uses interest rate swaps to fix variable short-term debt to a fixed rate. The values of these derivatives are included in Other current assets, Accounts payable and accrued liabilities, Accrued interest, and Other long-term liabilities on the Consolidated Balance Sheets. See Note 15 — Risk Management Activities and Derivative Transactions — Overview of Accounting Treatment and Derivatives Not Receiving Hedge Accounting Treatment — Interest Rate Derivatives for information regarding the interest rate swap liabilities.

Operating Lease Liabilities. TVA's operating leases consist primarily of railcars, equipment, real estate/land, and power generating facilities. At September 30, 2024 and 2023, the current portion of TVA's operating leases reported in Accounts payable and accrued liabilities was $63 million and $71 million, respectively. See Note 8 — Leases for more information regarding leases.

Currency Swap Liabilities. To protect against exchange rate risk related to British pound sterling denominated Bond transactions, TVA entered into foreign currency hedges. The values of these derivatives are included in Accounts payable and accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. See Note 15 — Risk Management Activities and Derivative Transactions — Overview of Accounting Treatment and Cash Flow Hedging Strategy for Currency Swaps for more information regarding the currency swap liabilities.

Commodity Contract Derivative Liabilities. TVA enters into certain derivative contracts for natural gas that require physical delivery of the contracted quantity of the commodity as well as certain financial derivative contracts to hedge exposure to the price of natural gas. See Note 15 — Risk Management Activities and Derivative Transactions — Derivatives Not Receiving Hedge Accounting Treatment — Commodity Derivatives and — Commodity Derivatives under the FHP for a discussion of TVA's commodity contract derivatives.

EnergyRight® Financing Obligation. TVA purchases certain loans receivable from its LPCs in association with the EnergyRight® program. The current and long-term portions of the resulting financing obligation are reported in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA's Consolidated Balance Sheets. At September 30, 2024 and 2023, the carrying amount of the financing obligation reported in Accounts payable and accrued liabilities was $13 million and $14 million respectively. See Note 9 — Other Long-Term Assets for information regarding the associated loans receivable.

Long-Term Deferred Compensation. TVA provides compensation arrangements to engage and retain certain employees, both executive and non-executive, which are designed to provide participants with the ability to defer compensation to future periods. The current and long-term portions are recorded in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA’s Consolidated Balance Sheets. At September 30, 2024 and 2023, the current amount of deferred compensation recorded in Accounts payable and accrued liabilities was $74 million and $65 million, respectively.

Advances for Construction. TVA receives refundable and non-refundable advances for construction that are generally intended to defray all or a portion of the costs of building or extending TVA’s existing power assets. Amounts received are deferred as a liability with the long-term portion representing amounts that will not be recognized within the next 12 months. As projects meet milestones or other contractual obligations, the refundable portion is refunded to the customer and the non-refundable portion is recognized as contributions in aid of construction and offsets the cost of plant assets. At September 30, 2024 and 2023, the current amount of advances for construction recorded in Accounts payable and accrued liabilities was $60 million and $39 million, respectively.

Long-Term Deferred Revenue. Long-term deferred revenue represents payments received that exceed services rendered resulting in the deferral of revenue. This long-term portion represents amounts that will not be recognized within the next 12 months primarily related to fiber and transmission agreements. The current and long-term portions of the deferral are recorded in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA’s Consolidated Balance Sheets. At September 30, 2024 and 2023, the current amount of deferred revenue recorded in Accounts payable and accrued liabilities was $28 million and $21 million, respectively.

Environmental Compliance and Remediation Costs. Environmental compliance and remediation costs represent certain costs associated with environmental remediation activities, including but not limited to those involving environmental cleanup activities and groundwater activities. The current and long-term portions of environmental compliance and remediation costs are reported in Accounts payable and accrued liabilities and Other long-term liabilities, respectively, on TVA's Consolidated Balance Sheets. At September 30, 2024, the current amount of the environmental compliance and remediation costs reported in Accounts payable and accrued liabilities was $3 million. There were no current amounts at September 30, 2023.