STATEMENTS OF OPERATIONS (Parentheticals) - shares	Apr. 24, 2025	Dec. 31, 2024
Class B ordinary shares \| Founder Shares
Aggregate number of shares subject to forfeiture	1,000,000	1,000,000

The maximum number of shares that are subject to forfeiture to the extent of partial exercise of the over-allotment option of underwriter.

No definition available.

Name:	tva_MaximumNumberOfSharesSubjectToForfeiture
Namespace Prefix:	tva_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant