Study of Itacitinib in Combination With Docetaxel in Subjects With Non-Small Cell Lung Cancer

Inclusion Criteria: 1. Histologically or cytologically confirmed diagnosis of NSCLC that is Stage IIIb, IV, or recurrent. 2. Received only 1 prior systemic chemotherapy regimen for Stage IIIb, IV, or recurrent disease not including neoadjuvant and/or adjuvant therapy. (NOTE: Exceptions may be allowed based on prior treatment regimens and tumor types in agreement with protocol requirements.) 3. Eastern Cooperative Oncology Group (ECOG) performance status 0 to 2. 4. Life expectancy of ≥12 weeks. Exclusion Criteria: 1. Received prior treatment with docetaxel. 2. Known active central nervous system (CNS) metastases. Subjects with CNS metastases who have completed a course of therapy would be eligible for the study provided they are clinically stable for at least 1 month prior to study entry, defined as: 1. No evidence of new or enlarging CNS metastasis or new neurological symptoms attributable to CNS metastases. 2. Subjects who are receiving concomitant corticosteroids must be on a stable or decreasing dose for at least 4 weeks prior to first dose of study treatment and off all anticonvulsants for at least 4 weeks prior to study entry. 3. Peripheral neuropathy ≥ Grade 3. 4. Current or previous other malignancy within 2 years of study entry, except cured basal or squamous cell skin cancer, superficial bladder cancer, prostate intraepithelial neoplasm, carcinoma in situ of the cervix, or other noninvasive malignancy. 5. Significant, concurrent, uncontrolled medical condition including but not limited to, renal, hepatic, hematological, gastrointestinal, endocrine, pulmonary, cardiac, neurological, cerebral, or psychiatric disease. 6. Unwilling to be transfused with blood components.