Business Combinations and Asset Purchases (Fair Values of the Business Combinations and Allocations for the Acquisitions Completed) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Business Acquisition [Line Items]
Goodwill	$ 7,416,584	$ 3,447,114	$ 3,111,227
BioLegend [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	3,336,115
Less: cash acquired	292,377
Business Combination, Consideration Transferred	5,688,964
Current assets	184,704
Property, plant and equipment	147,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	9,330
Goodwill	3,510,710
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(668,920)
Liabilities assumed	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(38,239)
Total	5,688,964
Business Combination, Consideration Transferred, Liabilities Incurred	6,857
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	2,638,369
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	0
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value	0
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	0	183
BioLegend [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	5,700,000
Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	1,128,584
Less: cash acquired	195,010
Business Combination, Consideration Transferred	994,098
Current assets		72,826
Property, plant and equipment		26,507
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		15,564
Goodwill		547,388
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total		(83,931)
Liabilities assumed		(4,628)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		(58,920)
Total		994,098
Business Combination, Consideration Transferred, Liabilities Incurred	2,910
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		(1,197)
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value	57,431
Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	1,200,000
Fiscal Year 2021 Other Acquisitions | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments	331,000
Fiscal Year 2020 Other Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		39,100
Horizon Discovery Group plc [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		399,800
Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		437,661
Working capital and other adjustments		(384)
Less: cash acquired		(26,840)
Business Combination, Consideration Transferred		412,097
Current assets		35,532
Property, plant and equipment		20,302
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		18,114
Goodwill		221,751
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total		(25,674)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		(46,430)
Total		412,097
Business Combination, Consideration Transferred, Liabilities Incurred		1,660
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		(2,031)
Fiscal Year 2020 Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments		438,900
Fiscal Year 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid			409,837
Working capital and other adjustments			3,401
Less: cash acquired			(15,984)
Business Combination, Consideration Transferred			417,072
Current assets			62,756
Property, plant and equipment			11,840
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			626
Goodwill			169,108
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total			(63,113)
Liabilities assumed			(3,404)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt			(26,718)
Total			417,072
Business Combination, Consideration Transferred, Liabilities Incurred			7,084
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value			12,734
Fiscal Year 2019 Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments			433,100
Fiscal Year 2019 Other Acquisitions [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments			46,600
Shandong Meizheng [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments			166,500
Cisbio Bioassays SAS [Member] | United States of America, Dollars
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid Including Working Capital And Other Adjustments			219,900
Core Technology [Member] | Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		65,730
Core Technology [Member] | Fiscal Year 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			153,267
Trade Names [Member] | Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		5,580
Trade Names [Member] | Fiscal Year 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			11,210
Customer Relationships [Member] | Fiscal Year 2019 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			101,500
In Process Research and Development [Member] | Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		10,700
License | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	8,979
License | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		0
Customer Relationships and Backlog [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,714,800
Customer Relationships and Backlog [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		141,170
Customer Relationships and Backlog [Member] | Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		108,523
Trade Names and Patents [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	38,000
Trade Names and Patents [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		39,620
Core technology and Clone Library [Member] | BioLegend [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	782,400
Core technology and Clone Library [Member] | Fiscal Year 2021 Acquisitions (Excluding BioLegend) [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		299,699
Diagnostics [Member]
Business Acquisition [Line Items]
Goodwill	1,970,350	1,691,227	1,612,407
Discovery & Analytical Solutions [Member]
Business Acquisition [Line Items]
Goodwill	$ 5,446,234	$ 1,755,887	$ 1,498,820