ACQUISITIONS AND DIVESTITURES - Purchase Price Allocations (Details) - USD ($) $ in Thousands	Dec. 25, 2021	Jun. 28, 2021	Mar. 30, 2021	Mar. 29, 2021	Dec. 31, 2020	Dec. 26, 2020	Aug. 06, 2020	Jan. 03, 2020	Dec. 28, 2019	Apr. 29, 2019
Business Acquisition [Line Items]
Goodwill	$ 2,711,881					$ 1,809,168			$ 1,540,565
Vigene Biosciences, Inc.
Business Acquisition [Line Items]
Trade receivables		$ 3,548
Other current assets (excluding cash)		1,657
Property, plant and equipment		7,649
Operating lease right-of-use asset, net		22,507
Goodwill		239,681
Definite-lived intangible assets		93,900
Other long-term assets		694
Deferred revenue		(4,260)
Current liabilities		(6,319)
Operating lease right-of-use liabilities		(21,220)
Deferred tax liabilities		(13,958)
Total purchase price allocation		$ 323,879
Retrogenix Limited
Business Acquisition [Line Items]
Trade receivables			$ 2,266
Other current assets (excluding cash)			209
Property, plant and equipment			400
Goodwill			34,489
Definite-lived intangible assets			22,126
Other long-term assets			1,385
Current liabilities			(1,575)
Deferred tax liabilities			(4,174)
Other long-term liabilities			(1,205)
Total purchase price allocation			$ 53,921
Cognate BioServices, Inc.
Business Acquisition [Line Items]
Trade receivables				$ 18,566
Inventories				4,231
Other current assets (excluding cash)				9,816
Property, plant and equipment				52,082
Operating lease right-of-use asset, net				34,349
Goodwill				612,147
Definite-lived intangible assets				270,900
Other long-term assets				6,098
Deferred revenue				(20,539)
Current liabilities				(44,974)
Operating lease right-of-use liabilities				(31,383)
Deferred tax liabilities				(31,847)
Other long-term liabilities				(414)
Total purchase price allocation				$ 879,032
Distributed Bio, Inc.
Business Acquisition [Line Items]
Trade receivables					$ 2,722
Other current assets (excluding cash)					221
Property, plant and equipment					2,382
Goodwill					71,585
Definite-lived intangible assets					24,540
Other long-term assets					2,055
Current liabilities					(2,823)
Deferred tax liabilities					(2,529)
Other long-term liabilities					(1,123)
Total purchase price allocation					$ 97,030
Cellero, LLC
Business Acquisition [Line Items]
Trade receivables							$ 1,500
Inventories							551
Other current assets (excluding cash)							182
Property, plant and equipment							1,648
Goodwill							19,457
Definite-lived intangible assets							16,230
Other long-term assets							849
Current liabilities							(1,360)
Deferred tax liabilities							(1,467)
Other long-term liabilities							(740)
Total purchase price allocation							$ 36,850
HemaCare Corporation
Business Acquisition [Line Items]
Trade receivables								$ 6,451
Inventories								8,468
Other current assets (excluding cash)								3,494
Property, plant and equipment								10,033
Goodwill								210,196
Definite-lived intangible assets								183,540
Other long-term assets								5,920
Current liabilities								(5,188)
Deferred tax liabilities								(38,529)
Other long-term liabilities								(7,664)
Total purchase price allocation								$ 376,721
Citoxlab
Business Acquisition [Line Items]
Trade receivables										$ 35,405
Inventories										5,282
Other current assets (excluding cash)										13,917
Property, plant and equipment										88,605
Goodwill										280,161
Definite-lived intangible assets										162,400
Other long-term assets										20,063
Deferred revenue										(15,278)
Current liabilities										(46,081)
Deferred tax liabilities										(27,458)
Other long-term liabilities										(22,624)
Redeemable noncontrolling interest										(4,035)
Total purchase price allocation										$ 490,357