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Benefit Plans Amounts Recognized on TVA's Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure |  |  |  |
Regulatory assets |  | $ (5,566) | $ (6,134) |
Non-current regulatory liabilities |  | (107) | (172) |
Accounts payable and accrued liabilities |  | (2,618) | (2,466) |
Pension and post-retirement benefit obligations |  | (2,527) | (3,072) |
Postemployment benefits liability, noncurrent |  | 266 | 299 |
Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Amount capitalized due to actions of regulator |  | 0 | 77 |
Regulatory assets |  | (1,440) | (1,839) |
Accounts payable and accrued liabilities |  | (6) | (6) |
Pension and post-retirement benefit obligations | [1] | (1,964) | (2,436) |
Other Post-retirement Benefits |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Amount capitalized due to actions of regulator |  | 0 | 0 |
Regulatory assets |  | (95) | (70) |
Non-current regulatory liabilities |  | (95) |  |
Accounts payable and accrued liabilities |  | (21) | (22) |
Pension and post-retirement benefit obligations | [1] | (326) | (366) |
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent |  |  |  |
Defined Benefit Plan Disclosure |  |  |  |
Postemployment benefits liability, noncurrent |  | $ 237 | $ 270 | $ 340
[1] | The table above excludes $237 million and $270 million of post-employment benefit costs that are recorded in Post-retirement and post-employment benefit obligations on the Consolidated Balance Sheets at September 30, 2023 and 2022, respectively.

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