['carcinoma, non-squamous non-small cell lung']
['atezolizumab (mpdl3280a), an engineered anti-pd-l1 antibody', 'carboplatin', 'nab-paclitaxel', 'pemetrexed']

        Inclusion Criteria:

          -  Eastern Cooperative Oncology Group performance status of 0 or 1

          -  Histologically or cytologically confirmed, Stage IV non-squamous NSCLC

          -  Participants with no prior treatment for Stage IV non-squamous NSCLC

          -  Previously obtained archival tumor tissue or tissue obtained from fresh biopsy at
             screening

          -  Measurable disease, as defined by RECIST v1.1

          -  Adequate hematologic and end organ function

        Exclusion Criteria:

        Cancer-Specific Exclusions:

          -  Active or untreated central nervous system metastases

          -  Malignancies other than NSCLC within 5 years prior to randomization, with the
             exception of those with a negligible risk of metastasis or death treated with expected
             curative outcome

        General Medical Exclusions:

          -  Pregnant or lactating women

          -  History of autoimmune disease

          -  History of idiopathic pulmonary fibrosis, organizing pneumonia, drug-induced
             pneumonitis, idiopathic pneumonitis, or evidence of active pneumonitis on screening
             chest computed tomography scan. History of radiation pneumonitis in the radiation
             field (fibrosis) is permitted

          -  Positive test for human immunodeficiency virus

          -  Active hepatitis B or hepatitis C

          -  Severe infection within 4 weeks prior to randomization

          -  Significant cardiovascular disease

          -  Illness or condition that interferes with the participant's capacity to understand,
             follow and/or comply with study procedures

        Exclusion Criteria Related to Medications:

          -  Prior treatment with cluster of differentiation 137 agonists or immune checkpoint
             blockade therapies, anti-programmed death-1, and anti-PD-L1 therapeutic antibodies
      