Inclusion Criteria:

          -  Histologically confirmed stage IV or recurrent NSCLC of squamous or non-squamous
             histology that is not amenable to therapy with curative intent (surgery or radiation
             therapy with or without chemotherapy).

          -  No prior treatment with systemic anti-cancer therapy for Stage IV disease.

          -  Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 to1.

          -  Measurable disease by computed tomography or magnetic resonance imaging per RECIST
             v1.1.

          -  Documentation of program death ligand-1 (PD-L1) status of 0 to 49% by IHC performed by
             the central laboratory prior to randomization.

          -  Other protocol inclusion criteria may apply

        Exclusion Criteria:

          -  Known epidermal growth factor receptor (EGFR) mutations sensitive to available
             targeted inhibitor therapy.

          -  Known ALK or ROS1 rearrangements sensitive to available targeted inhibitor therapy.

          -  Untreated central nervous system (CNS) metastases.

          -  Unevaluable PD-L1 status or PD-L1 status of ≥ 50% by IHC performed by a central
             laboratory.

          -  Carcinomatous meningitis.

          -  Active, known or suspected autoimmune disease.

          -  Prior treatment with anti-PD-1, anti-PD-L1, anti-PD-L2, anti-CTLA-4 antibody, IDO1
             targeted agent, or any other antibody or drug targeting T cell co-stimulation or
             checkpoint pathways.

          -  History of allergy or hypersensitivity to platinum-containing compounds or study drug
             components.

          -  Physical and laboratory test findings outside the protocol-defined range.

          -  Other protocol exclusion criteria may apply.