OUTLINE: Patients with evidence of leukemic progression receive cytoreduction therapy consisting of idarubicin IV on days 1-3 and cytarabine IV continuously over days 1-7 followed by filgrastim (G-CSF) subcutaneously (SC) daily until blood counts recover and leukapheresis is completed. Patients undergo leukapheresis beginning when blood counts recover and continuing until the target number of cells are collected. Patients with no evidence of leukemic progression receive filgrastim SC daily until leukapheresis is completed. Patients undergo leukapheresis beginning on day 4 and continuing until the target number of cells are collected. Patients receive myeloablative therapy consisting of oral busulfan every six hours on days -5 to -2. Patients with leukemic progression begin myeloablative therapy at least 28 days after completion of chemotherapy. Patients receive autologous peripheral blood stem cells IV on day 0. Patients are followed at 1 month, 3 months, 1 year, and then annually thereafter.