Segment Information - Summary of Company's Performance and Making Key Decision Regarding Resource Allocation (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Sep. 30, 2025 |
May 22, 2025 |
|
| Segment Reporting Information [Line Items] | ||||||
| Cash | $ 54,503 | $ 54,503 | $ 361,105 | |||
| Cash and marketable securities held in trust account | 241,164,305 | 241,164,305 | 234,628,166 | $ 231,150,000 | ||
| General administrative costs | 503,862 | $ 95,799 | 4,383,259 | $ 142,289 | ||
| Interest earned on cash and marketable securities held in trust account | 2,129,189 | 982,945 | 6,536,139 | 982,945 | ||
| Other operating segment [Member] | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Cash | 54,503 | 54,503 | 361,105 | |||
| Cash and marketable securities held in trust account | 241,164,305 | 241,164,305 | $ 234,628,166 | |||
| General administrative costs | 503,862 | 95,799 | 4,383,259 | 142,289 | ||
| Interest earned on cash and marketable securities held in trust account | $ 2,129,189 | $ 982,945 | $ 6,536,139 | $ 982,945 | ||
| X | ||||||||||
- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Trust interest income. No definition available.
|
| X | ||||||||||
- Details
|