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Regulatory Assets and Liabilities (Tables) | 6 Months Ended
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Mar. 31, 2015
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 March 31, 2015 |  | At September 30, 2014
Current regulatory assets |  |  |
Deferred nuclear generating units | $ | 237 |  |  | $ | 237 |
Unrealized losses on commodity derivatives | 213 |  |  | 134 |
Environmental agreements | 63 |  |  | 54 |
Environmental cleanup costs - Kingston ash spill | 45 |  |  | 47 |
Fuel cost adjustment receivable | 70 |  |  | 9 |
Other current regulatory assets | 1 |  |  | — |
Total current regulatory assets | 629 |  |  | 481 |
Non-current regulatory assets |  |  |  |  |
Deferred pension costs and other post-retirement benefits costs | 4,158 |  |  | 4,297 |
Deferred pension costs due to actions of regulator | 114 |  |  | — |
Unrealized losses on interest rate derivatives | 1,306 |  |  | 957 |
Nuclear decommissioning costs | 882 |  |  | 931 |
Environmental cleanup costs - Kingston ash spill | 365 |  |  | 421 |
Non-nuclear decommissioning costs | 654 |  |  | 645 |
Deferred nuclear generating units | 1,153 |  |  | 1,255 |
Environmental agreements | 79 |  |  | 108 |
Unrealized losses on commodity derivatives | 109 |  |  | 72 |
Other non-current regulatory assets | 293 |  |  | 308 |
Total non-current regulatory assets | 9,113 |  |  | 8,994 |
Total regulatory assets | $ | 9,742 |  |  | $ | 9,475 |
Current regulatory liabilities |  |  |  |  |
Fuel cost adjustment tax equivalents | $ | 170 |  |  | $ | 182 |
Unrealized gains on commodity derivatives | 4 |  |  | 2 |
Total current regulatory liabilities | 174 |  |  | 184 |
Non-current regulatory liabilities |  |  |  |  |
Unrealized gains on commodity derivatives | 1 |  |  | — |
Total non-current regulatory liabilities | 1 |  |  | — |
Total regulatory liabilities | $ | 175 |  |  | $ | 184 |

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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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