Organization	12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Note 1. Organization Description of Business Arcus Biosciences, Inc. (the Company) is a clinical-stage biopharmaceutical company focused on creating best-in-class cancer therapies. Using its robust and highly efficient drug discovery capability, the Company has now advanced six investigational products into clinical development, with its most advanced molecule, an anti-TIGIT antibody, now in two Phase 3 registrational studies. The Company’s deep portfolio of novel small molecules and enabling antibodies allows it to create highly differentiated combination therapies, which the Company is developing to treat multiple large tumor types including lung, colorectal, prostate and pancreatic cancers. The Company expects its clinical-stage portfolio to continue to expand and to include molecules targeting both immuno-oncology and cancer cell-intrinsic pathways. The Company’s vision is to create, develop and commercialize highly differentiated combination cancer therapies that have a meaningful impact on patients. The Company currently has six investigational products in clinical development: domvanalimab (previously referred to as AB154), etrumadenant (previously referred to as AB928), quemliclustat (previously referred to as AB680), and zimberelimab (previously referred to as AB122), AB308 and AB521.

Organization

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note 1. Organization

Description of Business

Arcus Biosciences, Inc. (the Company) is a clinical-stage biopharmaceutical company focused on creating best-in-class cancer therapies. Using its robust and highly efficient drug discovery capability, the Company has now advanced six investigational products into clinical development, with its most advanced molecule, an anti-TIGIT antibody, now in two Phase 3 registrational studies. The Company’s deep portfolio of novel small molecules and enabling antibodies allows it to create highly differentiated combination therapies, which the Company is developing to treat multiple large tumor types including lung, colorectal, prostate and pancreatic cancers. The Company expects its clinical-stage portfolio to continue to expand and to include molecules targeting both immuno-oncology and cancer cell-intrinsic pathways. The Company’s vision is to create, develop and commercialize highly differentiated combination cancer therapies that have a meaningful impact on patients. The Company currently has six investigational products in clinical development: domvanalimab (previously referred to as AB154), etrumadenant (previously referred to as AB928), quemliclustat (previously referred to as AB680), and zimberelimab (previously referred to as AB122), AB308 and AB521.