Fair Value Measurements - Fair Value of Contingent Consideration (Details) - Contingent Consideration - Discounted Cash Flow $ in Millions	9 Months Ended
Sep. 26, 2020 USD ($)
Measurement Input, Projected Royalties
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration payments: sales-based milestones	$ 36.8
Measurement Input, Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration payments: sales-based milestones (percent)	26.00%

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