Industry Segment Information (Schedule of Sales and Operating Income by Operating Segment, Excluding Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 691,685	$ 709,066	$ 1,341,605	$ 1,383,931
Operating income (loss) from continuing operations	85,724	78,056	129,840	154,175
Interest and other (income) expense, net	(938)	6,502	8,629	53,181
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	86,662	71,554	121,211	100,994
Total amortization expense related to finite-lived intangible assets	90,600	92,800	181,900	184,600
Product [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	606,891	624,456	1,172,646	1,216,736
Service [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	84,794	84,610	168,959	167,195
Corporate [Member]
Segment Reporting Information [Line Items]
Reportable segment operating income (loss)	(11,449)	(8,707)	(22,810)	(23,404)
Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	377,838	372,713	724,721	719,137
Reportable segment operating income (loss)	97,915	85,241	173,345	159,673
Life Sciences [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	313,847	336,353	616,884	664,794
Reportable segment operating income (loss)	112,401	127,759	214,126	257,218
Reportable Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	691,685	709,066	1,341,605	1,383,931
Reportable Segment Revenue [Member] | Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	378,045	372,919	725,137	719,549
Reportable Segment Revenue [Member] | Life Sciences [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	313,847	336,353	616,884	664,794
Segment Operating Income [Member]
Segment Reporting Information [Line Items]
Reportable segment operating income (loss)	198,867	204,293	364,661	393,487
Total amortization expense related to finite-lived intangible assets	(90,620)	(92,758)	(181,858)	(184,569)
Purchase accounting adjustments	(623)	(2,891)	(7,245)	(1,977)
Business Combination, Acquisition Related Costs	(5,779)	(28,579)	(17,241)	(46,530)
Significant litigation matters and settlements	(6,276)	0	(6,276)	0
Significant environmental matters	0	0	0	(1,132)
Restructuring and contract termination charges, net	(9,845)	(2,009)	(22,201)	(5,104)
Revenue Purchase Accounting Adjustments [Member] | Reportable Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ (207)	$ (206)	$ (416)	$ (412)