Retirement Plans - Summary of Net Pension and SERP Expense Recognized (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost pertaining to benefits earned during the year	$ 5.5	$ 6.3	$ 7.2
Interest cost on projected benefit obligations	15.2	16.5	17.7
Expected return on pension assets	(17.7)	(21.5)	(19.8)
Net amortization loss	2.6	3.3	9.8
Settlement loss	0.0	7.2	0.0
Net pension expense	5.6	11.8	14.9
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	0.2	6.3	9.4
SERP [Member]
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	$ 5.4	$ 5.5	$ 5.5