0001759824 altg:CommonStocksClassUndefinedMember 2026-05-29 2026-05-29 0001759824 us-gaap:PreferredStockMember 2026-05-29 2026-05-29 0001759824 2026-05-29 2026-05-29 false 0001759824 8-K 2026-05-29 ALTA EQUIPMENT GROUP INC. DE 001-38864 83-2583782 13211 Merriman Road Livonia MI 48150 248 449-6700 false false false false Common stock, $0.0001 par value per share ALTG NYSE Depositary Shares ALTG PRA NYSE false