v3.26.1
Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Apr. 05, 2026
Mar. 30, 2025
Dec. 28, 2025
Dec. 29, 2024
Mar. 13, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value $ 25,011 $ 19,740 $ 17,869 $ 21,753  
Unamortized Debt Issuance Expense 15,880        
Debt Instrument, Unamortized Discount (2,367)        
Payment for Contingent Consideration Liability, Financing Activities 0 $ 1,817      
Analytical, Food and Enterprise Services businesses [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Disposal Group, Consideration, Contingent on Exit Valuation         $ 150,000
2.55 Percent Senior Unsecured Notes due in 2031 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Unamortized Debt Issuance Expense 1,871        
Debt Instrument, Unamortized Discount (71)        
3.625 Percent Senior Unsecured Notes due in 2051 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Unamortized Debt Issuance Expense 3,968        
Debt Instrument, Unamortized Discount (3)        
1.875 Percent Ten Year Senior Unsecured Notes [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Unamortized Debt Issuance Expense 145        
Debt Instrument, Unamortized Discount (174)        
3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Unamortized Debt Issuance Expense 3,048        
Debt Instrument, Unamortized Discount (1,101)        
Quoted Prices In Active Markets (Level 1) [Member] | Fair Value, Recurring [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 0   0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 0   0    
Significant Other Observable Inputs (Level 2) [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term Debt 2,632,072        
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Recurring [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 0   0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value 0   0    
Significant Other Observable Inputs (Level 2) [Member] | 2.55 Percent Senior Unsecured Notes due in 2031 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term Debt 398,058        
Significant Other Observable Inputs (Level 2) [Member] | 3.625 Percent Senior Unsecured Notes due in 2051 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term Debt 396,029        
Significant Other Observable Inputs (Level 2) [Member] | 3.3 Percent Ten Year Senior Unsecured Notes due in Sept 2029 [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term Debt 845,851        
Significant Other Observable Inputs (Level 2) [Member] | Senior Unsecured Notes [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term Debt 3,210,600   3,222,900    
Unsecured senior notes, fair value 2,950,600   2,963,700    
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member]          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 25,011   17,869    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value $ 14,890   $ 14,890