Revenue - Summary of Net Revenue by Line of Business (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Disaggregation Of Revenue [Line Items]
Total Product Revenue	$ 487.0	$ 386.5	$ 986.7	$ 790.8
Collaborations and Other Revenue	5.5	4.0	12.6	7.7
Net Revenue	492.5	390.5	999.3	798.5
Clinical Laboratories
Disaggregation Of Revenue [Line Items]
Total Product Revenue	323.3	260.3	657.3	516.6
Transfusion Medicine
Disaggregation Of Revenue [Line Items]
Total Product Revenue	162.4	125.9	323.8	273.9
Other Product Revenue
Disaggregation Of Revenue [Line Items]
Total Product Revenue	$ 1.3	$ 0.3	$ 5.6	$ 0.3