Business Combinations (Fair Values of the Business Combinations and Allocations for the Acquisitions Completed) (Details) - USD ($)	6 Months Ended	12 Months Ended
Jul. 04, 2021	Jan. 03, 2021
Business Acquisition [Line Items]
Goodwill	$ 3,844,070,000	$ 3,447,114,000
Fiscal Year 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	859,548,000
Business Combination, Consideration Transferred, Liabilities Incurred	910,000
Cash Acquired	157,278,000
Business Combination, Consideration Transferred	703,180,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	35,265,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	13,293,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	15,187,000
Goodwill	428,923,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total	(68,821,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	(44,417,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	703,180,000
Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid		437,661,000
Business Combination, Consideration Transferred, Liabilities Incurred		1,660,000
Business Acquisition, Cost Of Acquired Entity, Working Capital Adjustments		384,000
Cash Acquired		(26,840,000)
Business Combination, Consideration Transferred		412,097,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets		35,532,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		20,302,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		18,114,000
Goodwill		221,960,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total		(27,142,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		(2,031,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		(45,171,000)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net		412,097,000
Core Technology [Member] \| Fiscal Year 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	193,260,000
Core Technology [Member] \| Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		65,730,000
Trade Names [Member] \| Fiscal Year 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	26,070,000
Trade Names [Member] \| Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		5,580,000
Patents [Member] \| Fiscal Year 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	150,000
Customer Relationships [Member] \| Fiscal Year 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	104,270,000
Customer Relationships [Member] \| Fiscal Year 2020 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		108,523,000
Diagnostics [Member]
Business Acquisition [Line Items]
Goodwill	1,952,135,000	1,691,227,000
Discovery & Analytical Solutions [Member]
Business Acquisition [Line Items]
Goodwill	$ 1,891,935,000	$ 1,755,887,000

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Total

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Cash acquired from acquisition.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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