v3.26.1
Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 29, 2024
Jul. 03, 2027
Components of net periodic pension costs        
Service cost within selling, general and administrative expenses $ 10,873 $ 11,480 $ 10,252  
Interest cost $ 22,966 $ 24,732 $ 24,579  
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)  
Expected return on plan assets $ (42,212) $ (41,721) $ (39,941)  
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)  
Recognized net actuarial loss $ 11,365 $ 5,226 $ 227  
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)  
Total net periodic pension benefit within other expense, net $ (7,881) $ (11,763) $ (15,135)  
Net periodic pension cost (benefit) $ 2,992 $ (283) $ (4,883)  
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense) Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)  
Contributions $ 8,000 $ 8,000    
Forecast        
Components of net periodic pension costs        
Estimated future employer pension plan contributions       $ 8,000