CONDENSED BALANCE SHEETS - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Current Assets:
Cash	$ 256,897	$ 856,131
Prepaid expenses	126,838	102,500
Total Current Assets	383,735	958,631
Prepaid expenses, non-current		33,334
Investments held in Trust Account	236,580,243	232,460,533
Total Assets	236,963,978	233,452,498
Current Liabilities:
Accounts payable	120,055
Accrued expenses	2,744,164	231,427
Due to related party	$ 0	$ 2,425
Other Liability, Current, Related Party [Extensible Enumeration]	us-gaap:RelatedPartyMember	us-gaap:RelatedPartyMember
Total Current Liabilities	$ 2,864,219	$ 233,852
Deferred underwriting commissions	9,000,000	9,000,000
Total Liabilities	11,864,219	9,233,852
Commitments and contingencies (Note 6)
Shareholders' Deficit:
Preference shares, $0.0001 par value; 5,000,000 shares authorized; none issued and outstanding at June 30, 2026 and December 31, 2025
Additional paid-in capital		1,621,805
Accumulated deficit	(11,481,234)	(9,864,442)
Total Shareholders' Deficit	(11,480,484)	(8,241,887)
Total Liabilities, Class A Ordinary Shares Subject to Possible Redemption and Shareholders' Deficit	236,963,978	233,452,498
Class A ordinary shares subject to possible redemption
Current Liabilities:
Class A ordinary shares subject to possible redemption, 22,500,000 shares issued and outstanding at redemption value of $10.51 and $10.33 per share, at June 30, 2026 and December 31, 2025, respectively	236,580,243	232,460,533
Class B ordinary shares
Shareholders' Deficit:
Ordinary shares	$ 750	$ 750

The amount of deferred underwriting commissions.

No definition available.

Name:	tva_DeferredUnderwritingCommissions
Namespace Prefix:	tva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).