Industry Segment and Geographic Area Information Schedule of Depreciation, Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Schedule of Segment Reporting Information, by Segment [Line Items]
Depreciation and amortization expense	$ 358,004	$ 246,507	$ 214,025
Payments to Acquire Property, Plant, and Equipment	99,888	77,506	76,331
Diagnostics [Member]
Schedule of Segment Reporting Information, by Segment [Line Items]
Depreciation and amortization expense	214,178	149,738	136,476
Payments to Acquire Property, Plant, and Equipment	57,206	55,236	46,863
Discovery & Analytical Solutions [Member]
Schedule of Segment Reporting Information, by Segment [Line Items]
Depreciation and amortization expense	141,261	93,516	74,445
Payments to Acquire Property, Plant, and Equipment	41,686	20,217	27,778
Corporate [Member]
Schedule of Segment Reporting Information, by Segment [Line Items]
Depreciation and amortization expense	2,565	3,253	3,104
Payments to Acquire Property, Plant, and Equipment	996	2,053	1,690
All Segments [Member]
Schedule of Segment Reporting Information, by Segment [Line Items]
Depreciation and amortization expense	358,004	246,507	214,025
Payments to Acquire Property, Plant, and Equipment	$ 99,888	$ 77,506	$ 76,331