XML 47 R72.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefits - Additional Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Oct. 26, 2019
Apr. 27, 2019
Apr. 25, 2020
Apr. 27, 2019
Apr. 28, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Pension termination (refund)/charge   $ 32,700,000 $ (1,900,000) $ 32,671,000 $ 0
Pre-tax refund from insurance $ 1,900,000        
Net periodic pension cost     $ 0 35,998,000 $ 4,205,000
Non-cash gain due to change in employee vacation policy       5,100,000  
401(k) Retirement Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Additional expense from increase in matching contributions       1,700,000  
Minimum | Performance Compensation Retirement Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Period to elect to receive benefit payments     5 years    
Maximum | Performance Compensation Retirement Plan          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Period to elect to receive benefit payments     20 years    
Cost of Sales          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Non-cash gain due to change in employee vacation policy       1,300,000  
Incremental expense due to change in employee vacation policy       $ 1,100,000