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v3.25.1

Asset Retirement Obligations (Tables) | 6 Months Ended
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Mar. 31, 2025
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 | (9) |  |  | (114) |  |  | (123) |  |
Revisions in estimate (non-cash) | 2 |  |  | (24) |  |  | (22) |  |
Accretion (recorded as regulatory asset) | 86 |  |  | 131 |  |  | 217 |  |
Balance at March 31, 2025 | $ | 3,893 |  |  | $ | 6,985 |  |  | $ | 10,878 |  | (1)
Note (1) Includes $316 million and $283 million at March 31, 2025, 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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