Stock-based Compensation - Compensation Expense Related to Stock-Based Compensation Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2026	Jun. 29, 2025	Jun. 28, 2026	Jun. 29, 2025
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 12.0	$ 12.8	$ 22.7	$ 23.9
Income Statement Location [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1.3	1.4	2.3	2.8
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	0.8	0.8	1.6	1.6
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	9.9	7.9	18.8	16.1
Income Statement Location [Axis]: qdel:RestructuringIntegrationAndOtherCharges
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 0.0	$ 2.7	$ 0.0	$ 3.4