Goodwill and Intangible Assets, Net (Changes in the Carrying Amount of Goodwill) (Details) $ in Thousands	3 Months Ended
	Apr. 05, 2020 USD ($)
Changes in the carrying amount of goodwill
Balance at beginning of period	$ 3,111,227
Foreign currency translation	(57,941)
Goodwill, Acquisition, Earn Outs and Other Adjustments	(1,592)
Balance at end of period	3,051,694
Diagnostics [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	1,612,407
Foreign currency translation	(30,027)
Goodwill, Acquisition, Earn Outs and Other Adjustments	0
Balance at end of period	1,582,380
Discovery & Analytical Solutions [Member]
Changes in the carrying amount of goodwill
Balance at beginning of period	1,498,820
Foreign currency translation	(27,914)
Goodwill, Acquisition, Earn Outs and Other Adjustments	(1,592)
Balance at end of period	$ 1,469,314