XML 62 R39.htm IDEA: XBRL DOCUMENT
v3.24.2

Regulatory Assets and Liabilities (Tables) | 3 Months Ended
--- | ---
Jun. 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 (in millions)
| At June 30, 2024 |  | At September 30, 2023
Current regulatory assets |  |  |
Unrealized losses on commodity derivatives | $ | 122 |  |  | $ | 136 |
Unrealized losses on interest rate derivatives | 34 |  |  | 31 |
Fuel cost adjustment receivable | 22 |  |  | 11 |
Total current regulatory assets | 178 |  |  | 178 |
Non-current regulatory assets |  |  |
Non-nuclear decommissioning costs | 6,183 |  |  | 2,922 |
Retirement benefit plans deferred costs | 1,432 |  |  | 1,440 |
Nuclear decommissioning costs | 471 |  |  | 728 |
Unrealized losses on interest rate derivatives | 344 |  |  | 272 |
Environmental compliance and remediation costs | 169 |  |  | — |
Unrealized losses on commodity derivatives | 59 |  |  | 52 |
Other non-current regulatory assets | 151 |  |  | 152 |
Total non-current regulatory assets | 8,809 |  |  | 5,566 |
Total regulatory assets | $ | 8,987 |  |  | $ | 5,744 |
Current regulatory liabilities |  |  |
Fuel cost adjustment tax equivalents | $ | 173 |  |  | $ | 201 |
Unrealized gains on commodity derivatives | 9 |  |  | 21 |
Total current regulatory liabilities | 182 |  |  | 222 |
Non-current regulatory liabilities |  |  |
Retirement benefit plans deferred credits | 82 |  |  | 95 |
Unrealized gains on commodity derivatives | 9 |  |  | 12 |
Total non-current regulatory liabilities | 91 |  |  | 107 |
Total regulatory liabilities | $ | 273 |  |  | $ | 329 |
Non-Nuclear Decommissioning Costs. Non-nuclear decommissioning costs include (1) certain deferred charges related to the future closure and decommissioning of TVA's non-nuclear long-lived assets, (2) recognition of changes in the liability, (3) recognition of changes in the value of TVA's Asset Retirement Trust, and (4) certain other deferred charges under the accounting rules for asset retirements obligations ("AROs"). During the three months ended June 30, 2024, TVA recorded additional estimated AROs of $3.1 billion as a result of the Environmental Protection Agency's ("EPA's") final legacy CCR rule ("Legacy CCR Rule") and recorded a corresponding regulatory asset of $3.1 billion due to these AROs being associated with closed sites and asset retirement costs having been fully depreciated. See Note 11 — Asset Retirement Obligations. Environmental Compliance and Remediation Costs. TVA uses regulatory accounting for certain amounts associated with compliance with an order, regulation, settlement, or lawsuit, or certain costs associated with environmental remediation activities, including but not limited to those involving environmental cleanup activities and groundwater activities. Costs will be recovered in rates based on the average life of debt financed to fund actual expenditures. See Note 20 — Contingencies and Legal Proceedings — Contingencies — Environmental Matters.

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-types1: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