Industry Segment and Geographic Area Information Schedule of Depreciation, Amortization and Capital Expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Depreciation and amortization expense	$ 214,025	$ 180,588	$ 105,000
Payments to Acquire Property, Plant, and Equipment	76,331	93,253	39,089
Diagnostics [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	136,476	107,434	31,204
Payments to Acquire Property, Plant, and Equipment	46,863	54,737	11,262
Discovery & Analytical Solutions [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	74,445	70,362	72,590
Payments to Acquire Property, Plant, and Equipment	27,778	34,852	26,200
Corporate [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	3,104	2,792	1,206
Payments to Acquire Property, Plant, and Equipment	1,690	3,664	1,627
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	214,025	180,588	105,000
Payments to Acquire Property, Plant, and Equipment	76,331	93,253	39,089
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	0	0	929
Payments to Acquire Property, Plant, and Equipment	$ 0	$ 0	$ 182