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Financial Instruments and Fair Value Measures - Concentrations of Risk (Details) - wholesaler
6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Accounts receivable, net      
Concentration of Risk      
Number of principal customers 3    
Accounts receivable, net | Geographic risk | Principal US customers      
Concentration of Risk      
Concentrations risk (as a percent) 73.00%   72.00%
Total revenues | HUMIRA | Humira      
Concentration of Risk      
Concentrations risk (as a percent) 37.00% 50.00%