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ACQUISITIONS AND DIVESTITURES - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Apr. 05, 2022
Oct. 12, 2021
Jun. 28, 2021
Mar. 30, 2021
Mar. 29, 2021
Mar. 03, 2021
Dec. 31, 2020
Mar. 26, 2022
Mar. 27, 2021
Dec. 26, 2020
Dec. 25, 2021
Business Acquisition [Line Items]                      
Integration related costs and transaction costs               $ 7,100 $ 8,700    
Goodwill               $ 2,695,994     $ 2,711,881
Disposal Group, Disposed of by Sale, Not Discontinued Operations | RMS Japan                      
Business Acquisition [Line Items]                      
Consideration received from divestiture   $ 73,100                  
Cash proceeds from divestiture   7,900                  
Pension over funding and other post-closing adjustments   3,800                  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CDMO Sweden                      
Business Acquisition [Line Items]                      
Consideration received from divestiture   59,600                  
Cash proceeds from divestiture   200                  
Contingent consideration   15,300                  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CDMO Sweden | Maximum                      
Business Acquisition [Line Items]                      
Contingent consideration   25,000                  
Purchase obligation   $ 10,000                  
Explora BioLabs Holdings, Inc. | Subsequent Event                      
Business Acquisition [Line Items]                      
Purchase price $ 295,000                    
Vigene Biosciences, Inc.                      
Business Acquisition [Line Items]                      
Purchase price     $ 323,900                
Cash acquired     2,700                
Contingent consideration liability     34,500                
Goodwill     239,681                
Definite-lived intangible assets     93,900                
Property, plant and equipment     7,649                
Vigene Biosciences, Inc. | Maximum                      
Business Acquisition [Line Items]                      
Consideration contingent upon future performance     $ 57,500                
Retrogenix Limited                      
Business Acquisition [Line Items]                      
Purchase price       $ 53,900              
Cash acquired       8,500              
Contingent consideration liability       6,900              
Goodwill       34,489              
Definite-lived intangible assets       22,126              
Property, plant and equipment       $ 400              
Cognate BioServices, Inc.                      
Business Acquisition [Line Items]                      
Purchase price         $ 877,900            
Cash acquired         70,500            
Value of consideration not acquired         $ 15,700            
Ownership percentage not acquired         2.00%            
Goodwill         $ 611,555            
Definite-lived intangible assets         270,900            
Property, plant and equipment         $ 52,082            
Distributed Bio, Inc.                      
Business Acquisition [Line Items]                      
Purchase price             $ 97,000        
Cash acquired             800        
Contingent consideration liability             14,100        
Cash portion of consideration transferred             80,800        
Payments to settle promissory note             3,000        
Goodwill             71,585        
Definite-lived intangible assets             24,540        
Property, plant and equipment             2,382        
Distributed Bio, Inc. | Maximum                      
Business Acquisition [Line Items]                      
Consideration contingent upon future performance             $ 21,000        
Other Acquisitions                      
Business Acquisition [Line Items]                      
Purchase price           $ 35,400          
Contingent consideration liability           15,900          
Cash portion of consideration transferred           19,500       $ 5,500  
Goodwill           17,300          
Definite-lived intangible assets           15,200          
Property, plant and equipment           3,000          
Other Acquisitions | Maximum                      
Business Acquisition [Line Items]                      
Consideration contingent upon future performance           $ 17,500          
Cognate BioServices, Inc. and Viegene Biosciences, Inc. | Depreciation and Amortization Expense                      
Business Acquisition [Line Items]                      
Adjustments related to prior period                 9,200    
Cognate BioServices, Inc. and Viegene Biosciences, Inc. | Interest Expense                      
Business Acquisition [Line Items]                      
Adjustments related to prior period                 $ 3,400