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Asset Retirement Obligations (Tables) | 3 Months Ended
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Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation Activity |
Asset Retirement Obligation Activity (in millions) |
| Nuclear |  | Non-nuclear |  | Total |
Balance at September 30, 2024 | $ | 3,814 |  |  | $ | 6,992 |  |  | $ | 10,806 |  | (1)
Settlements | (7) |  |  | (61) |  |  | (68) |  |
Revisions in estimate (non-cash) | — |  |  | (24) |  |  | (24) |  |
Accretion (recorded as regulatory asset) | 43 |  |  | 65 |  |  | 108 |  |
Balance at December 31, 2024 | $ | 3,850 |  |  | $ | 6,972 |  |  | $ | 10,822 |  | (1)
Note (1) Includes $301 million and $283 million at December 31, 2024, and September 30, 2024, 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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