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Net Loss Per Common Share - Basic and Diluted Loss per Common Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Earnings Per Share [Abstract]        
Net loss $ (50,288,562) $ (25,226,539) $ (91,252,853) $ (46,965,710)
Weighted average number of common shares outstanding, basic and diluted 48,860,930 38,739,922 48,741,296 38,644,209
Net loss attributed to Arvinas common shareholders - basic and diluted $ (1.03) $ (0.65) $ (1.87) $ (1.22)