Fair value measurement - Valuation technique and inputs used in determining the fair value of contingent consideration (Details) - Discounted cash flow - Discount rate	Mar. 28, 2021
Milestone-based payments | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.012
Milestone-based payments | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.025
Milestone-based payments | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.015
Revenue-based payments | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.016
Revenue-based payments | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.100
Revenue-based payments | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business combination, contingent consideration, liability, measurement input	0.032