{"cik":2092446,"taxonomy":"us-gaap","tag":"EarningsPerShareBasic","label":"Earnings Per Share, Basic","description":"The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.","entityName":"Avalanche Treasury Corporation","units":{"USD/shares":[{"start":"2025-09-22","end":"2025-12-31","val":-145.38,"accn":"0001104659-26-082644","fy":null,"fp":null,"form":"S-1","filed":"2026-07-10"},{"start":"2025-09-22","end":"2025-12-31","val":-145.38,"accn":"0001104659-26-085808","fy":null,"fp":null,"form":"S-1/A","filed":"2026-07-22","frame":"CY2025Q4"},{"start":"2026-01-01","end":"2026-03-31","val":-139.64,"accn":"0001104659-26-078841","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-06-29"},{"start":"2026-01-01","end":"2026-03-31","val":-139.64,"accn":"0001104659-26-082644","fy":null,"fp":null,"form":"S-1","filed":"2026-07-10"},{"start":"2026-01-01","end":"2026-03-31","val":-139.64,"accn":"0001104659-26-085808","fy":null,"fp":null,"form":"S-1/A","filed":"2026-07-22","frame":"CY2026Q1"}]}}