Business Combinations and Asset Purchases (Fair Values of the Business Combinations and Allocations for the Acquisitions Completed) (Details) - USD ($)	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Oct. 04, 2020	Jul. 05, 2020	Apr. 05, 2020
Business Acquisition [Line Items]
Goodwill	$ 3,447,114,000	$ 3,111,227,000	$ 2,952,608,000
Fiscal Year 2020 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	38,243,000
Working capital and other adjustments	(176,000)
Less: cash acquired	1,300,000
Business Combination, Consideration Transferred	38,030,000
Current assets	5,770,000
Property, plant and equipment	2,673,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	371,000
Goodwill	16,224,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(1,132,000)
Liabilities assumed	(29,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(3,180,000)
Total	38,030,000
Business Combination, Consideration Transferred, Liabilities Incurred	1,263,000
Horizon Discovery Group plc [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	399,005,000
Working capital and other adjustments	0
Less: cash acquired	25,539,000
Business Combination, Consideration Transferred	373,862,000
Current assets	29,762,000
Property, plant and equipment	17,729,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	17,743,000
Goodwill	200,745,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(22,480,000)
Liabilities assumed	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(39,906,000)
Total	373,862,000
Business Combination, Consideration Transferred, Liabilities Incurred	396,000
Fiscal Year 2019 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		45,042,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value		634,000
Working capital and other adjustments		302,000
Less: cash acquired		1,334,000
Business Combination, Consideration Transferred		45,282,000
Current assets	4,125,000
Property, plant and equipment		727,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				$ 502,000
Goodwill		17,079,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(6,603,000)
Liabilities assumed		(2,698,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(3,527,000)
Total		45,282,000
Business Combination, Consideration Transferred, Liabilities Incurred		638,000
Shandong Meizheng [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		145,000,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value		12,100,000
Working capital and other adjustments		2,961,000
Less: cash acquired		2,108,000
Business Combination, Consideration Transferred		164,399,000
Current assets	15,077,000
Property, plant and equipment		6,278,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets				$ 24,000
Goodwill	78,612,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(21,548,000)
Liabilities assumed		(706,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(10,638,000)
Total		164,399,000
Business Combination, Consideration Transferred, Liabilities Incurred		6,446,000
Cisbio Bioassays SAS [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		219,795,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value		0
Working capital and other adjustments		138,000
Less: cash acquired		12,542,000
Business Combination, Consideration Transferred		207,391,000
Current assets		43,554,000
Property, plant and equipment		4,835,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		100,000
Goodwill					$ 73,417,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total					$ (34,962,000)
Liabilities assumed		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		(12,553,000)
Total		207,391,000
Business Combination, Consideration Transferred, Liabilities Incurred		0
Fiscal Year 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid			95,950,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred, Contingent Consideration at Fair Value			6,200,000
Working capital and other adjustments			261,000
Less: cash acquired			1,132,000
Business Combination, Consideration Transferred			104,633,000
Current assets		4,905,000
Property, plant and equipment		1,166,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		776,000
Goodwill			65,886,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total			(9,049,000)
Liabilities assumed			(461,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt			(3,881,000)
Total			104,633,000
Business Combination, Consideration Transferred, Liabilities Incurred			3,354,000
Core Technology [Member] | Fiscal Year 2020 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	5,730,000
Core Technology [Member] | Horizon Discovery Group plc [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	60,000,000
Core Technology [Member] | Fiscal Year 2019 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		27,667,000
Core Technology [Member] | Shandong Meizheng [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 36,600,000
Core Technology [Member] | Cisbio Bioassays SAS [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						89,000,000
Core Technology [Member] | Fiscal Year 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			31,956,000
Trade Names [Member] | Fiscal Year 2020 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	680,000
Trade Names [Member] | Horizon Discovery Group plc [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	4,900,000
Trade Names [Member] | Fiscal Year 2019 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		1,310,000
Trade Names [Member] | Shandong Meizheng [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		4,900,000
Trade Names [Member] | Cisbio Bioassays SAS [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		5,000,000
Trade Names [Member] | Fiscal Year 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			1,070,000
Customer Relationships [Member] | Fiscal Year 2020 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	10,923,000
Customer Relationships [Member] | Horizon Discovery Group plc [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	96,600,000
Customer Relationships [Member] | Fiscal Year 2019 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		6,700,000
Customer Relationships [Member] | Shandong Meizheng [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 55,800,000
Customer Relationships [Member] | Cisbio Bioassays SAS [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		39,000,000
Customer Relationships [Member] | Fiscal Year 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			10,200,000
In Process Research and Development [Member] | Fiscal Year 2020 Other Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	0
In Process Research and Development [Member] | Horizon Discovery Group plc [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	10,800,000
GC Libraries [Member] | Fiscal Year 2018 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			2,065,000
Diagnostics [Member]
Business Acquisition [Line Items]
Goodwill	1,691,227,000	1,612,407,000	1,617,616,000
Discovery & Analytical Solutions [Member]
Business Acquisition [Line Items]
Goodwill	$ 1,755,887,000	$ 1,498,820,000	$ 1,334,992,000