Industry Segment Information (Schedule of Sales and Operating Income by Operating Segment, Excluding Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 684,049	$ 670,739	$ 2,025,654	$ 2,054,670
Operating income (loss) from continuing operations	98,151	69,228	227,991	223,403
Interest and other (income) expense, net	(2,206)	18,625	6,423	71,806
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	100,357	50,603	221,568	151,597
Total amortization expense related to finite-lived intangible assets	89,600	90,900	271,500	275,500
Product [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	598,773	586,676	1,771,419	1,803,412
Service [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	85,276	84,063	254,235	251,258
Corporate [Member]
Segment Reporting Information [Line Items]
Reportable segment operating income (loss)	(10,915)	(11,323)	(33,725)	(34,727)
Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	383,128	362,884	1,107,849	1,082,021
Reportable segment operating income (loss)	101,434	81,741	274,779	241,414
Life Sciences [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	300,921	307,855	917,805	972,649
Reportable segment operating income (loss)	102,979	114,192	317,105	371,410
Reportable Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	684,049	670,739	2,025,654	2,054,670
Reportable Segment Revenue [Member] | Diagnostics [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	383,333	363,090	1,108,470	1,082,639
Reportable Segment Revenue [Member] | Life Sciences [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	300,921	307,855	917,805	972,649
Segment Operating Income [Member]
Segment Reporting Information [Line Items]
Reportable segment operating income (loss)	193,498	184,610	558,159	578,097
Total amortization expense related to finite-lived intangible assets	(89,642)	(90,920)	(271,500)	(275,489)
Purchase accounting adjustments	(103)	(1,080)	(7,348)	(3,057)
Acquisition, divestiture and rebranding costs	(4,874)	(12,550)	(22,115)	(59,080)
Significant litigation matters and settlements	(810)	0	(7,086)	0
Significant environmental matters	0	0	0	(1,132)
Restructuring and other, net	82	(10,832)	(22,119)	(15,936)
Revenue Purchase Accounting Adjustments [Member] | Reportable Segment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ (205)	$ (206)	$ (621)	$ (618)