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Benefits Expected to be Paid from Plans Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Pension plans      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid $ 7,762 $ 29,484  
2021 4,273    
2022 3,006    
2023 2,795    
2024 2,623    
2025 2,297    
2025 – 2030 9,513    
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid [1]     $ 48,722
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid [2]   29,484  
Pension plans | Includes Plan No 1 and No 2 Single Lump Sum      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid [3] 348,561    
Postretirement Benefit Plans      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid 1,148 1,384  
Postretirement Benefit Plans | Employer Gross Contribution      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Benefits paid 575 $ 722 $ 1,308
2021 616    
2022 625    
2023 606    
2024 636    
2025 670    
2025 – 2030 $ 3,272    
[1] Includes $24.9 million and $1.5 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.  
[2] Includes $7.0 million and $0.7 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.
[3] Includes $104.5 million and $0.4 million from Plan No. 1 and Plan No. 2, respectively, paid as lump sums.