XML 61 R33.htm IDEA: XBRL DOCUMENT
v3.21.2

Regulatory Assets and Liabilities (Tables) | 9 Months Ended
--- | ---
Jun. 30, 2021
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, 2021 |  | At September 30, 2020
Current regulatory assets |  |  |
Unrealized losses on interest rate derivatives | $ | 114 |  |  | $ | 114 |
Unrealized losses on commodity derivatives | 3 |  |  | 4 |
Fuel cost adjustment receivable | 15 |  |  | 12 |
Total current regulatory assets | 132 |  |  | 130 |
Non-current regulatory assets |  |  |
Deferred pension costs and other post-retirement benefits costs | 4,917 |  |  | 5,193 |
Non-nuclear decommissioning costs | 2,593 |  |  | 2,512 |
Unrealized losses on interest rate derivatives | 1,174 |  |  | 1,506 |
Nuclear decommissioning costs | 349 |  |  | 896 |
Unrealized losses on commodity derivatives | 1 |  |  | — |
Other non-current regulatory assets | 148 |  |  | 138 |
Total non-current regulatory assets | 9,182 |  |  | 10,245 |
Total regulatory assets | $ | 9,314 |  |  | $ | 10,375 |
Current regulatory liabilities |  |  |
Fuel cost adjustment tax equivalents | $ | 119 |  |  | $ | 115 |
Unrealized gains on commodity derivatives | 89 |  |  | 26 |
Total current regulatory liabilities | 208 |  |  | 141 |
Non-current regulatory liabilities |  |  |
Unrealized gains on commodity derivatives | 20 |  |  | 23 |
Total regulatory liabilities | $ | 228 |  |  | $ | 164 |

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: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RegulatoryAssetsAndLiabilitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration