XML 26 R161.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Benefits Expected to be Paid from Plans Assets (Parenthetical) (Detail) - Includes Plan No 1 and No 2 Single Lump Sum - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Lump Sums Plan No. 1      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets     $ 14.4
Lump Sums Plan No. 1      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets   $ 24.9  
Lump Sums Plan No. 1      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets $ 7.0    
Lump Sums Plan No. 2      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets     $ 1.6
Lump Sums Plan No. 2      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets   $ 1.5  
Lump Sums Plan No. 2      
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]      
Distributions from existing plan assets $ 0.7