Goodwill and Intangible Assets, Net (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2023	Jan. 02, 2022	Jan. 03, 2021
Goodwill and Intangible Assets Net [Line Items]
Total amortization expense related to finite-lived intangible assets	$ 370,600	$ 256,600	$ 161,000
Future Amortization Expense, Year One	363,800
Future Amortization Expense, Year Two	355,200
Future Amortization Expense, Year Three	334,000
Future Amortization Expense, Year Four	327,000
Future Amortization Expense, Year Five	299,600
Finite-Lived Intangible Assets, Net	3,377,174	3,821,847
Goodwill	$ 6,481,768	6,627,119	2,639,587
Impairment Testing Date	January 3, 2022
Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	$ 85,863	102,890
Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	8,360	9,989
Discovery & Analytical Solutions [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	2,686,191	2,928,636
Goodwill	4,551,575	4,656,769	948,360
Discovery & Analytical Solutions [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	39,576	45,176
Discovery & Analytical Solutions [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	4,896	5,547
Diagnostics [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	690,983	893,211
Goodwill	1,930,193	1,970,350	$ 1,691,227
Diagnostics [Member] | Trade Names And Trademarks [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	46,287	57,714
Diagnostics [Member] | Licenses [Member]
Goodwill and Intangible Assets Net [Line Items]
Finite-Lived Intangible Assets, Net	$ 3,464	$ 4,442