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Regulatory Assets and Liabilities Regulatory Assets and Liabilities (Tables) | 12 Months Ended
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Sep. 30, 2024
Regulatory Assets and Liabilities Disclosure [Abstract] |
Regulatory Assets and Liabilities | Components of regulatory assets and regulatory liabilities are summarized in the table below.
Regulatory Assets and Liabilities At September 30 (in millions)
| 2024 |  | 2023
Current regulatory assets |  |  |
Unrealized losses on commodity derivatives | $ | 102 |  |  | $ | 136 |
Unrealized losses on interest rate derivatives | 54 |  |  | 31 |
Fuel cost adjustment receivable | 35 |  |  | 11 |
Total current regulatory assets | 191 |  |  | 178 |
Non-current regulatory assets |  |  |
Non-nuclear decommissioning costs | 6,187 |  |  | 2,922 |
Retirement benefit plans deferred costs | 1,979 |  |  | 1,440 |
Unrealized losses on interest rate derivatives | 447 |  |  | 272 |
Nuclear decommissioning costs | 362 |  |  | 728 |
Environmental compliance and remediation costs | 215 |  |  | — |
Unrealized losses on commodity derivatives | 64 |  |  | 52 |
Other non-current regulatory assets | 154 |  |  | 152 |
Total non-current regulatory assets | 9,408 |  |  | 5,566 |
Total regulatory assets | $ | 9,599 |  |  | $ | 5,744 |
Current regulatory liabilities |  |  |
Fuel cost adjustment tax equivalents | $ | 169 |  |  | $ | 201 |
Unrealized gains on commodity derivatives | 5 |  |  | 21 |
Total current regulatory liabilities | 174 |  |  | 222 |
Non-current regulatory liabilities |  |  |
Retirement benefit plans deferred credits | 81 |  |  | 95 |
Unrealized gains on commodity derivatives | 2 |  |  | 12 |
Total non-current regulatory liabilities | 83 |  |  | 107 |
Total regulatory liabilities | $ | 257 |  |  | $ | 329 |

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- Definition Tabular disclosure of assets and liabilities that are created when regulatory agencies permit public utilities to defer certain costs included in rate-setting to the balance sheet or that result from rate actions of a regulator. Rate actions of a regulator can impose a liability on a regulated enterprise resulting in a regulatory liability. Regulatory liabilities can result from obligations to make refunds to customers or deferral of gains that will be credited to customers in future periods + References No definition available. + Details
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- References No definition available. + Details
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