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Retirement Plans - Summary of Net Pension and SERP Expense Recognized (Detail) - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]      
Service cost pertaining to benefits earned during the year $ 6.4 $ 5.5 $ 6.3
Interest cost on projected benefit obligations 14.2 15.2 16.5
Expected return on pension assets (18.7) (17.7) (21.5)
Net amortization loss 6.6 2.6 3.3
Settlement loss 0.0 0.0 7.2
Net pension expense 8.5 5.6 11.8
Pension [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net pension expense 3.3 0.2 6.3
SERP [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net pension expense $ 5.2 $ 5.4 $ 5.5