Study of Nivolumab (BMS-936558) in Combination With Gemcitabine/Cisplatin, Pemetrexed/Cisplatin, Carboplatin/Paclitaxel, Bevacizumab Maintenance, Erlotinib, Ipilimumab or as Monotherapy in Subjects With Stage IIIB/IV Non-small Cell Lung Cancer (NSCLC) (CheckMate 012)

* The study is evaluating the safety and tolerability of Nivolumab (BMS-936558) when combined with three platinum-based doublet chemotherapy regimens (Cisplatin/Gemcitabine; Cisplatin/Pemetrexed; and Carboplatin/Paclitaxel) in subjects with NSCLC. * The study is evaluating the safety and tolerability of Nivolumab as maintenance therapy in combination with Bevacizumab/Avastin that will be given after at least 4 cycles of platinum doublet chemotherapy. * The study is evaluating the safety and tolerability of Nivolumab in combination with Erlotinib among epidermal growth factor receptor (EGFR) mutation positive non-squamous NSCLC subjects and as monotherapy in subjects with NSCLC. * The study is evaluating the safety and tolerability of Nivolumab in combination with Ipilimumab in subjects with squamous and non-squamous NSCLC. * The study is evaluating the safety and tolerability of Nivolumab as switch maintenance therapy in subjects with squamous and non-squamous NSCLC. * The study is evaluating the safety and tolerability of Nivolumab as monotherapy among subjects with untreated, asymptomatic brain metastases and no evidence of cerebral edema.