Goodwill and Intangible Assets, Net (Changes in the Carrying Amount of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	$ 6,481,768	$ 6,627,119
Foreign currency translation	51,782	(139,885)
Acquisitions, earn outs and other		(5,466)
Ending balance	6,533,550	6,481,768
Life Sciences [Member]
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	4,551,575	4,656,769
Foreign currency translation	36,363	(98,268)
Acquisitions, earn outs and other		(6,926)
Ending balance	4,587,938	4,551,575
Diagnostics [Member]
Changes in the carrying amount of goodwill
Goodwill, Beginning Balance	1,930,193	1,970,350
Foreign currency translation	15,419	(41,617)
Acquisitions, earn outs and other		1,460
Ending balance	$ 1,945,612	$ 1,930,193