A Study to Evaluate the Efficacy and Safety of Daratumumab in Combination With Cyclophosphamide, Bortezomib and Dexamethasone (CyBorD) Compared to CyBorD Alone in Newly Diagnosed Systemic Amyloid Light-chain (AL) Amyloidosis

Inclusion Criteria

• Histopathological diagnosis of amyloidosis based on detection by immunohistochemistry and polarizing light microscopy of green bi-refringent material in congo red stained tissue specimens (in an organ other than bone marrow) or characteristic electron microscopy appearance
• Measurable disease of amyloid light-chain (AL) amyloidosis as defined by at least one of the following:
• serum monoclonal (M)-protein greater than or equal (>=) 0.5 grams/deciliter (g/dL) by protein electrophoresis (routine serum protein electrophoresis and immunofixation [IFE] performed at a central laboratory)
• serum free light chain greater than or equal to (>=) 50 milligram/Liter (mg/L) with an abnormal kappa:lambda ratio or the difference between involved and uninvolved free light chains (dFLC) >= 50 mg/L
• One or more organs impacted by AL amyloidosis according to consensus guidelines
• Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) 0, 1 or 2

Exclusion Criteria

• Prior therapy for AL amyloidosis or multiple myeloma including medications that target CD38, with the exception of 160 mg dexamethasone (or equivalent corticosteroid) maximum exposure prior to randomization
• Previous or current diagnosis of symptomatic multiple myeloma, including the presence of lytic bone disease, plasmacytomas, >= 60 percent (%) plasma cells in the bone marrow, or hypercalcemia
• Evidence of significant cardiovascular conditions as specified below:
• NT-ProBNP > 8500 nanogram per liter (ng/L)
• New York Heart Association (NYHA) classification IIIB or IV heart failure
• Heart failure that in the opinion of the investigator is on the basis of ischemic heart disease (eg, prior myocardial infarction with documented history of cardiac enzyme elevation and electrocardiogram [ECG] changes) or uncorrected valvular disease and not primarily due to AL amyloid cardiomyopathy
• Inpatient admission to a hospital for unstable angina or myocardial infarction within the last 6 months prior to first dose or percutaneous cardiac intervention with recent stent within 6 months or coronary artery bypass grafting within 6 months
• For participants with congestive heart failure, cardiovascular-related hospitalizations within 4 weeks prior to randomization
• Participants with a history of sustained ventricular tachycardia or aborted ventricular fibrillation or with a history of atrioventricular (AV) nodal or sinoatrial (SA) nodal dysfunction for which a pacemaker/implantable cardioverter-defibrillators [ICD] is indicated but not placed (participants who do have a pacemaker/ICD are allowed on study)
• Screening 12-lead ECG showing a baseline QT interval as corrected by Fridericia's formula (QTcF) > 500 milliseconds (msec). Participants who have a pacemaker may be included regardless of calculated QTc interval
• Supine systolic blood pressure 20 mmHg despite medical management (eg, midodrine, fludrocortisones) in the absence of volume depletion
• Planned stem cell transplant during the first 6 cycles of protocol therapy are excluded. Stem cell collection during the first 6 cycles of protocol therapy is permitted
• Known to be seropositive for human immunodeficiency virus (HIV)
• Any one of the following:
• Seropositive for hepatitis B (defined by a positive test for hepatitis B surface antigen [HBsAg]). Participants with resolved infection (ie, participants who are HBsAg negative but positive for antibodies to hepatitis B core antigen [anti-HBc] and/or antibodies to hepatitis B surface antigen [anti-HBs]) must be screened using real-time polymerase chain reaction (PCR) measurement of hepatitis B virus (HBV) deoxyribonucleic acid (DNA) levels. Those who are PCR positive will be excluded
• Known to be seropositive for hepatitis C (except in the setting of a sustained virologic response [SVR], defined as aviremia at least 12 weeks after completion of antiviral therapy)
• Grade 2 sensory or Grade 1 painful peripheral neuropathy