Goodwill and Intangible Assets, Net (Changes in the Carrying Amount of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jul. 04, 2021 USD ($)
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 3,447,114
Foreign currency translation	(36,957)
Goodwill, Acquisition, Earn Outs and Other Adjustments	433,913
Balance at end of period	3,844,070
Diagnostics [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	1,691,227
Foreign currency translation	(17,806)
Goodwill, Acquisition, Earn Outs and Other Adjustments	278,714
Balance at end of period	1,952,135
Discovery & Analytical Solutions [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	1,755,887
Foreign currency translation	(19,151)
Goodwill, Acquisition, Earn Outs and Other Adjustments	155,199
Balance at end of period	$ 1,891,935