XML 110 R86.htm IDEA: XBRL DOCUMENT
v3.23.1

Contingencies and Legal Proceedings Legal Proceedings (Details) | Mar. 31, 2023 Units
--- | ---
Legal Proceedings |
Number of licensed nuclear units | 7

X
- Definition The number of licensed nuclear units owned. + References No definition available. + Details
Name: | tve_NumberOfLicensedNuclearUnits
Namespace Prefix: | tve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration