XML 43 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Regulatory Assets and Liabilities (Tables) | 3 Months Ended
--- | ---
Dec. 31, 2013
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 December 31, 2013 |  | At September 30, 2013
Current regulatory assets |  |  |
Deferred nuclear generating units | $ | 237 |  |  | $ | 237 |
Unrealized losses on commodity derivatives | 154 |  |  | 183 |
Environmental agreements | 81 |  |  | 73 |
Environmental cleanup costs - Kingston ash spill | 64 |  |  | 68 |
Fuel cost adjustment receivable | 26 |  |  | — |
Total current regulatory assets | 562 |  |  | 561 |
Non-current regulatory assets |  |  |  |  |
Deferred pension costs and other post-retirement benefits costs | 4,011 |  |  | 4,076 |
Unrealized losses on interest rate derivatives | 669 |  |  | 808 |
Nuclear decommissioning costs | 856 |  |  | 893 |
Environmental cleanup costs - Kingston ash spill | 518 |  |  | 681 |
Non-nuclear decommissioning costs | 570 |  |  | 571 |
Deferred nuclear generating units | 1,411 |  |  | 1,438 |
Environmental agreements | 164 |  |  | 189 |
Unrealized losses on commodity derivatives | 133 |  |  | 139 |
Other non-current regulatory assets | 328 |  |  | 336 |
Total non-current regulatory assets | 8,660 |  |  | 9,131 |
Total regulatory assets | $ | 9,222 |  |  | $ | 9,692 |
Current regulatory liabilities |  |  |  |  |
Fuel cost adjustment tax equivalents | $ | 169 |  |  | $ | 176 |
Fuel cost adjustment liability | — |  |  | 29 |
Unrealized gains on commodity derivatives | 5 |  |  | 7 |
Total current regulatory liabilities | 174 |  |  | 212 |
Non-current regulatory liabilities |  |  |  |  |
Unrealized gains on commodity derivatives | 1 |  |  | 1 |
Total non-current regulatory liabilities | 1 |  |  | 1 |
Total regulatory liabilities | $ | 175 |  |  | $ | 213 |

X
- 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
Name: | tve_ScheduleOfRegulatoryAssetsAndLiabilitiesTableTextBlock
Namespace Prefix: | tve_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration