Leases - Narrative (Details)	3 Months Ended	6 Months Ended
	Jun. 27, 2020	Jun. 27, 2020
Minimum
Lessee, Lease, Description [Line Items]
Lease extension term, COVID-19 related (in months)	3 months
Maximum
Lessee, Lease, Description [Line Items]
Lease extension term, COVID-19 related (in months)	12 months
Stores, laboratories, distribution centers, offices | Minimum
Lessee, Lease, Description [Line Items]
Lease terms (in years)		5 years
Lease extension term, COVID-19 related (in months)		1 year
Stores, laboratories, distribution centers, offices | Maximum
Lessee, Lease, Description [Line Items]
Lease terms (in years)		10 years
Renewal terms (in years)		10 years