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Regulatory Assets and Liabilities (Tables) | 9 Months Ended
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Jun. 30, 2014
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 June 30, 2014 |  | At September 30, 2013
Current regulatory assets |  |  |
Deferred nuclear generating units | $ | 237 |  |  | $ | 237 |
Unrealized losses on commodity derivatives | 137 |  |  | 183 |
Environmental agreements | 77 |  |  | 73 |
Environmental cleanup costs - Kingston ash spill | 53 |  |  | 68 |
Fuel cost adjustment receivable | 62 |  |  | — |
Total current regulatory assets | 566 |  |  | 561 |
Non-current regulatory assets |  |  |  |  |
Deferred pension costs and other post-retirement benefits costs | 3,875 |  |  | 4,076 |
Unrealized losses on interest rate derivatives | 898 |  |  | 808 |
Nuclear decommissioning costs | 898 |  |  | 893 |
Environmental cleanup costs - Kingston ash spill | 449 |  |  | 681 |
Non-nuclear decommissioning costs | 577 |  |  | 571 |
Deferred nuclear generating units | 1,308 |  |  | 1,438 |
Environmental agreements | 139 |  |  | 189 |
Unrealized losses on commodity derivatives | 112 |  |  | 139 |
Other non-current regulatory assets | 310 |  |  | 336 |
Total non-current regulatory assets | 8,566 |  |  | 9,131 |
Total regulatory assets | $ | 9,132 |  |  | $ | 9,692 |
Current regulatory liabilities |  |  |  |  |
Fuel cost adjustment tax equivalents | $ | 177 |  |  | $ | 176 |
Fuel cost adjustment liability | — |  |  | 29 |
Unrealized gains on commodity derivatives | 4 |  |  | 7 |
Total current regulatory liabilities | 181 |  |  | 212 |
Non-current regulatory liabilities |  |  |  |  |
Unrealized gains on commodity derivatives | 2 |  |  | 1 |
Total non-current regulatory liabilities | 2 |  |  | 1 |
Total regulatory liabilities | $ | 183 |  |  | $ | 213 |

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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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- Details
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