Goodwill and Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017	Dec. 29, 2013	Dec. 30, 2012
Goodwill and Intangible Assets Net [Line Items]
Total amortization expense related to finite-lived intangible assets	$ 135,900	$ 73,700	$ 71,500
Future Amortization Expense, Year One	149,700
Future Amortization Expense, Year Two	152,000
Future Amortization Expense, Year Three	136,700
Future Amortization Expense, Year Four	126,600
Future Amortization Expense, Year Five	109,100
Finite-Lived Intangible Assets, Net	1,129,083	1,276,356
Goodwill	$ 2,952,608	3,002,198	2,247,966
Impairment Testing Date	1/1/2018
Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	$ 44,345	52,724
Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	7,755	10,665
Discovery & Analytical Solutions [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	162,388	184,747
Goodwill	1,334,992	1,344,235	1,303,936
Discovery & Analytical Solutions [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	8,083	9,928
Discovery & Analytical Solutions [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	5,802	8,441
Diagnostics [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	966,695	1,091,609
Goodwill	1,617,616	1,657,963	944,030
Diagnostics [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	36,262	42,796
Diagnostics [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	1,953	2,224
Other Asset Acquisitions [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net				$ 7,000	$ 6,800
Prepaid Royalties	65,000			$ 40,300	$ 25,000
Prepaid Royalties, Other Current Asset	5,600
Prepaid Royalties, Other Assets	$ 59,400
Payments of Additional Prepaid Royalties		$ 5,100	9,400
Other Asset Acquisitions extension [Member]
Goodwill and Intangible Assets Net [Line Items]
Prepaid Royalties			$ 6,000