Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023	Mar. 13, 2023	Aug. 01, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (17,246)	$ (23,063)	$ (19,929)	$ 521,567
Analytical, Food and Enterprise Services businesses [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Consideration						$ 2,450,000
Disposal Group, Including Discontinued Operation, Revenue	0	0	0	175,423
(Loss) Gain on Sale, before Income Tax	(23,749)	(31,232)	(25,459)	835,687
Discontinued Operation, Tax Effect of Discontinued Operation	(6,503)	(8,169)	(5,530)	280,581
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(17,246)	(23,063)	(19,929)	521,567
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	0	0	0	124,647
Disposal Group, Including Discontinued Operation, General and Administrative Expense	0	0	0	74,794
Disposal Group, Including Discontinued Operations, Research and development expenses	0	0	0	10,434
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	0	0	(34,452)
Disposal Group, Including Discontinued Operation, Total other (expense) income	(23,749)	(31,232)	(25,459)	836,600
Discontinued Operation, Income from Discontinued Operation, before Income Tax	(23,749)	(31,232)	(25,459)	802,148
Disposal Group, Consideration, Receivable at Closing, Deferred Payments Tied to Transfer of the PKI Brand and Related Trademarks					$ 75,000
Disposal Group, Consideration, Receivable at Closing, Deferred Payments Tied to Transfer of the PKI Brand and Related Trademarks, Recognized at Closing					65,200
Disposal Group, Consideration, Contingent on Exit Valuation					150,000
Disposal Group, Including Discontinued Operation, Other income, net	0	$ 0	0	$ 913
Disposal Group, including Discontinued Operations, Receivable at Closing, Working Capital Adjustments	138,500		138,500
Disposal Group, including Discontinued Operations, Fair Value of Consideration, Contingent on Exit Valuation					$ 15,900
Disposal Group, Consideration, Cash Proceeds at Closing	$ 2,270,000		$ 2,270,000