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ACQUISITIONS AND DIVESTITURES - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 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
Sep. 25, 2021
Sep. 24, 2022
Sep. 25, 2021
Dec. 26, 2020
Dec. 25, 2021
Business Acquisition [Line Items]                        
Goodwill                 $ 2,776,005     $ 2,711,881
Disposal Group, Disposed of by Sale, Not Discontinued Operations | RMS Japan                        
Business Acquisition [Line Items]                        
Consideration received from divestiture   $ 70,900                    
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             7,500      
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                        
Business Acquisition [Line Items]                        
Purchase price allocation $ 284,521                      
Cash acquired 6,600                      
Goodwill 215,752                      
Definite-lived intangible assets $ 70,100                      
Weighted average amortization life of intangible assets acquired 12 years                      
Property, plant and equipment $ 37,369                      
Vigene Biosciences, Inc.                        
Business Acquisition [Line Items]                        
Purchase price allocation     $ 323,879                  
Cash acquired     2,700                  
Purchase price     323,900                  
Contingent consideration liability     34,500           0      
Goodwill     239,681                  
Definite-lived intangible assets     $ 93,900                  
Weighted average amortization life of intangible assets acquired     11 years                  
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 allocation       $ 53,921                
Cash acquired       8,500                
Purchase price       53,900                
Contingent consideration liability       6,900                
Goodwill       34,489                
Definite-lived intangible assets       $ 22,126                
Weighted average amortization life of intangible assets acquired       11 years                
Property, plant and equipment       $ 400                
Cognate BioServices, Inc.                        
Business Acquisition [Line Items]                        
Purchase price allocation         $ 877,865              
Cash acquired         70,500              
Purchase price         877,900              
Value of consideration not acquired         $ 15,700              
Ownership percentage not acquired         2.00%              
Goodwill         $ 611,555              
Definite-lived intangible assets         $ 270,900              
Weighted average amortization life of intangible assets acquired         13 years              
Property, plant and equipment         $ 52,082              
Distributed Bio, Inc.                        
Business Acquisition [Line Items]                        
Purchase price allocation             $ 97,030          
Cash acquired             800          
Purchase price             97,000          
Contingent consideration liability             14,100   0      
Cash portion of consideration transferred             80,800          
Payments to settle promissory note             3,000          
Payments for contingent considerations                 7,000      
Goodwill             71,585          
Definite-lived intangible assets             $ 24,540          
Weighted average amortization life of intangible assets acquired             7 years          
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     $ 0      
Cash portion of consideration transferred           19,500         $ 5,500  
Goodwill           17,300            
Definite-lived intangible assets           $ 15,200            
Weighted average amortization life of intangible assets acquired           4 years            
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               $ 4,300   $ 17,600    
Cognate BioServices, Inc. and Viegene Biosciences, Inc. | Interest expense                        
Business Acquisition [Line Items]                        
Adjustments related to prior period               $ 0   $ 5,600