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Benefit Plans Amounts Recognized on TVA's Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | --- | ---
Defined Benefit Plan Disclosure |  |  |  |
Regulatory assets |  | $ (9,408) | $ (5,566) |
Non-current regulatory liabilities |  | (83) | (107) |
Accounts payable and accrued liabilities |  | (2,910) | (2,618) |
Pension and post-retirement benefit obligations |  | (2,887) | (2,527) |
Postemployment benefits liability, noncurrent |  | 258 | 266 |
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Regulatory assets |  | (1,979) | (1,440) |
Accounts payable and accrued liabilities |  | (6) | (6) |
Pension and post-retirement benefit obligations | [1] | (2,323) | (1,964) |
Other Post-retirement Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Regulatory assets |  | (81) | (95) |
Non-current regulatory liabilities |  | (81) |  |
Accounts payable and accrued liabilities |  | (20) | (21) |
Pension and post-retirement benefit obligations | [1] | (333) | (326) |
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Postemployment benefits liability, noncurrent |  | $ 230 | $ 237 | $ 299
[1] | The table above excludes $230 million of post-employment benefit costs and $1 million of Restoration Plan costs at September 30, 2024, and $237 million of post-employment benefit costs at September 30, 2023 that are recorded in Post-retirement and post-employment benefit obligations on the Consolidated Balance Sheets.

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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