Combination Chemotherapy in Treating Patients With Recurrent or Refractory Leukemia or Lymphoma

DISEASE CHARACTERISTICS: * One of the following must be present: * Histologically confirmed acute myeloid leukemia or acute lymphoblastic leukemia * More than 5% blasts in the bone marrow or peripheral blood unrelated to recovery of normal hematopoiesis from prior chemotherapy * Failed at least 1 attempt at induction chemotherapy * Diagnosis of non-Hodgkin's lymphoma or Hodgkin's lymphoma * Refractory or relapsed after at least 1 regimen of standard chemotherapy * Diagnosis of chronic myelogenous leukemia in accelerated phase or blast crisis * Received at least 1 myelotoxic chemotherapy regimen * Active CNS involvement allowed PATIENT CHARACTERISTICS: Age * 55 and under Performance status * ECOG 0-2 Life expectancy * At least 5 weeks Hematopoietic * Lymphoma patients: * WBC at least 2,000/mm\^3\* * Platelet count at least 20,000/mm\^3\* NOTE: \*Unless due to bone marrow involvement or disease process Hepatic * Bilirubin no greater than 3 times normal\* * AST/ALT no greater than 3 times normal\* * Alkaline phosphatase no greater than 3 times normal\* * No severe liver failure NOTE: \*Unless related to leukemia Renal * Creatinine clearance greater than 50 mL/min * No severe renal failure Cardiovascular * LVEF at least 45% by MUGA Pulmonary * DLCO at least 60% of predicted Other * HIV negative * Not pregnant or nursing * Negative pregnancy test * Fertile patients must use effective contraception * No psychiatric illness that would preclude informed consent * No medical illness or other condition that would preclude study participation PRIOR CONCURRENT THERAPY: Biologic therapy * Not specified Chemotherapy * See Disease Characteristics * At least 24 hours since prior hydroxyurea * At least 1 week since other prior chemotherapy Endocrine therapy * Not specified Radiotherapy * Not specified Surgery * Not specified Other * Recovered from prior therapy