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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. 29, 2025
Jun. 30, 2024
Jun. 29, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Segment revenue $ 720,284 $ 691,685 $ 1,385,046 $ 1,341,605
Total amortization expense related to finite-lived intangible assets 85,300 90,600 168,000 181,900
Operating income (loss) from continuing operations 90,760 85,724 162,990 129,840
Interest and other expense (income), net 22,110 (938) 41,958 8,629
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 68,650 86,662 121,032 121,211
Product [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 610,704 589,091 1,169,758 1,137,930
Service [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 109,580 102,594 215,288 203,675
Diagnostics [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 354,386 343,160 678,753 656,566
Segment operating income 89,422 92,749 163,437 168,953
Life Sciences [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 365,898 348,525 706,293 685,039
Segment operating income 115,469 117,567 221,180 218,518
Reportable Segment Revenue [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 720,284 691,685 1,385,046 1,341,605
Reportable Segment Revenue [Member] | Diagnostics [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 354,386 343,160 678,753 656,566
Reportable Segment Revenue [Member] | Life Sciences [Member]        
Segment Reporting Information [Line Items]        
Segment revenue 365,898 348,525 706,293 685,039
Segment Operating Income [Member]        
Segment Reporting Information [Line Items]        
Segment operating income 204,891 210,316 384,617 387,471
Segment Operating Income [Member] | Diagnostics [Member]        
Segment Reporting Information [Line Items]        
Segment Cost of Revenue 156,039 146,294 291,230 277,183
Segment Selling, general and administrative expenses 84,127 83,071 174,017 165,880
Segment research and development expenses 24,798 21,046 50,069 44,550
Segment Operating Income [Member] | Life Sciences [Member]        
Segment Reporting Information [Line Items]        
Segment Cost of Revenue 135,028 120,427 254,349 243,988
Segment Selling, general and administrative expenses 86,986 84,167 174,081 170,104
Segment research and development expenses 28,415 26,364 56,683 52,429
Reconciling Item (to Reconcile Segment Operating Income to Income from Continuing Operations before Income Taxes) [Member]        
Segment Reporting Information [Line Items]        
Corporate Expenses (13,089) (11,449) (22,904) (22,810)
Total amortization expense related to finite-lived intangible assets (85,289) (90,620) (167,989) (181,858)
Purchase accounting adjustments 2,178 623 2,001 7,245
Acquisition and divestiture-related costs 1,248 5,779 3,789 17,241
Significant litigation matters and settlements $ 1,124 $ 6,276 $ 11,710 $ 6,276
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Selling, general and administrative expenses Selling, general and administrative expenses Selling, general and administrative expenses Selling, general and administrative expenses
Significant environmental matters     $ 1,208 $ 0