Significant Accounting Policies - Estimated Useful Life for Each Asset (Details)	12 Months Ended
	Dec. 28, 2019
Minimum | Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	20 years
Minimum | Laboratory and manufacturing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	1 year 6 months
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	3 years
Minimum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	1 year 6 months
Minimum | Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	1 year
Maximum | Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	41 years
Maximum | Laboratory and manufacturing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	10 years
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	10 years
Maximum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	7 years
Maximum | Leasehold and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	11 years