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Asset Retirement Obligations (Tables) | 9 Months Ended
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Jun. 30, 2023
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation Activity |
Asset Retirement Obligation Activity |
| Nuclear |  | Non-Nuclear |  | Total |
Balance at September 30, 2022 | $ | 3,643 |  |  | $ | 3,519 |  |  | $ | 7,162 |  | (1)
Settlements | — |  |  | (195) |  |  | (195) |  |
Revisions in estimate | 6 |  |  | (28) |  |  | (22) |  |
Accretion (recorded as regulatory asset) | 124 |  |  | 53 |  |  | 177 |  |
Balance at June 30, 2023 | $ | 3,773 |  |  | $ | 3,349 |  |  | $ | 7,122 |  | (1)
Note (1) Includes $262 million and $275 million at June 30, 2023, and September 30, 2022, respectively, in Current liabilities.

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 + Details
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