Retirement and Other Employee Benefits - Net Periodic Pension Cost of Defined Benefit Pension and Post-Retirement Benefit Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Pension plans | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.0	$ 0.0	$ 0.0
Interest cost	0.4	0.3	0.5
Expected return on assets	(0.8)	(0.8)	(1.0)
Net amortization	0.5	0.5	0.5
Net periodic cost (income)	0.1	0.0	0.0
Pension plans | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0	0.0
Interest cost	1.0	1.0	1.1
Expected return on assets	(1.8)	(1.4)	(1.5)
Net amortization	0.1	0.1	0.1
Net periodic cost (income)	(0.7)	(0.3)	(0.3)
Post-retirement plans | Central America
Defined Benefit Plan Disclosure [Line Items]
Service cost	5.7	6.0	6.3
Interest cost	3.9	4.0	4.2
Expected return on assets	0.0	0.0	0.0
Net amortization	0.1	0.0	0.7
Net periodic cost (income)	$ 9.7	$ 10.0	$ 11.2