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Summary of Significant Accounting Policies - Impairment (Details)
 3 Months Ended 12 Months Ended
Sep. 27, 2025
USD ($)
Jun. 28, 2025
USD ($)
Mar. 29, 2025
USD ($)
Dec. 28, 2024
USD ($)
Dec. 30, 2023
USD ($)
Jul. 01, 2023
USD ($)
Sep. 27, 2025
USD ($)
Sep. 28, 2024
USD ($)
Sep. 30, 2023
USD ($)
Jun. 29, 2024
USD ($)
Mar. 30, 2024
USD ($)
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets     $ 204,000,000                
Impairment of intangible assets and equipment             $ 42,500,000 $ 5,600,000 $ 44,300,000    
Assets, fair value $ 1,077,800,000           1,077,800,000 996,800,000      
Impairment of intangible assets and equipment             $ 183,400,000 $ 39,200,000 $ 179,500,000    
Ultrasound Imaging Assets                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           $ 26,400,000          
Assets, fair value           0          
Ultrasound Imaging Assets, Equipment                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           5,800,000          
Minimum                      
Finite-Lived Intangible Assets [Line Items]                      
Intangible assets useful life 3 years           3 years        
Maximum                      
Finite-Lived Intangible Assets [Line Items]                      
Intangible assets useful life 30 years           30 years        
Developed technology                      
Finite-Lived Intangible Assets [Line Items]                      
Finite-lived intangible assets, net                   $ 0 $ 13,900,000
Trade names                      
Finite-Lived Intangible Assets [Line Items]                      
Finite-lived intangible assets, net                   $ 0 $ 500,000
In-process research and development                      
Finite-Lived Intangible Assets [Line Items]                      
Indefinite-lived intangible assets, fair value           26,500,000          
In-process research and development | Valuation Technique, Discounted Cash Flow                      
Finite-Lived Intangible Assets [Line Items]                      
Measurement input                   0.170  
Ultrasound Imaging Assets, Developed Technology                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           20,600,000          
Cost Of Goods And Services Sold                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets     183,400,000                
Operating Expense                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets     20,600,000                
In-process research and development                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           10,500,000          
Developed technology                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     183,400,000                
Customer relationship                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     19,000,000                
Trade names                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     1,600,000                
Acessa                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     61,900,000                
Asset Group Fair Value     8,100,000                
Finite-lived intangible assets, net     $ 7,200,000                
Acessa | Measurement Input, Discount Rate                      
Finite-Lived Intangible Assets [Line Items]                      
Measurement input     0.135                
Bolder                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     $ 64,500,000                
Asset Group Fair Value     4,100,000                
Finite-lived intangible assets, net     $ 0                
Bolder | Measurement Input, Discount Rate                      
Finite-Lived Intangible Assets [Line Items]                      
Measurement input     0.163                
Diagenode                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     $ 38,600,000                
Asset Group Fair Value     6,700,000                
Finite-lived intangible assets, net     $ 3,000,000                
Diagenode | Measurement Input, Discount Rate                      
Finite-Lived Intangible Assets [Line Items]                      
Measurement input     0.125                
Mobidiag                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     $ 39,000,000     174,800,000          
Asset Group Fair Value     13,400,000                
Finite-lived intangible assets, net     6,700,000                
Accelerated amortization       $ 7,300,000              
Impairment of intangible assets and equipment           186,900,000          
Mobidiag | In-process research and development                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment $ 5,000,000                    
Mobidiag | In-process research and development                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     16,900,000 4,300,000              
Intangible assets, current         $ 22,400,000            
Other indefinite-lived intangible assets     5,000,000 22,400,000              
Indefinite-lived intangible assets, fair value 0           $ 0        
Impairment of intangible assets and equipment $ 5,000,000   $ 16,900,000   $ 4,300,000            
Mobidiag | Customer relationship                      
Finite-Lived Intangible Assets [Line Items]                      
Finite-lived intangible assets, net       0              
Mobidiag | Trade names                      
Finite-Lived Intangible Assets [Line Items]                      
Finite-lived intangible assets, net       $ 0              
Mobidiag | Measurement Input, Discount Rate                      
Finite-Lived Intangible Assets [Line Items]                      
Measurement input     0.180                
Mobidiag Oy                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           186,900,000          
Mobidiag Oy | Equipment                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           12,100,000          
Mobidiag Oy | Customer relationship                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           10,400,000          
Mobidiag Oy | Trade names                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           10,700,000          
Mobidiag Oy | Developed Technology                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment           $ 153,700,000          
Focal Therapeutics                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment     $ 26,800,000                
Focal Therapeutics | Developed technology                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment   $ 13,300,000 25,900,000                
Finite-lived intangible assets, net     13,900,000                
Focal Therapeutics | Trade names                      
Finite-Lived Intangible Assets [Line Items]                      
Impairment of intangible assets and equipment   $ 400,000 900,000                
Finite-lived intangible assets, net     $ 500,000