Retirement and Other Employee Benefits - Reconciliation of Benefit Obligations, Plan Assets and Funded Status for Defined Benefit Pension Plans and Post-Retirement Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2022	Dec. 31, 2021	Jan. 01, 2021
Change in Plan Assets:
Beginning fair value	$ 14.3
Ending fair value		$ 14.3
Amounts recognized in Accumulated other comprehensive loss:
Net gains occurring during the year	3.1	2.4
Foreign Plan | Pension plans
Amounts recognized in Accumulated other comprehensive loss:
Net gains occurring during the year	1.8	1.1
United States | Pension plans
Change in Benefit Obligation:
Beginning benefit obligation	14.9	16.4
Service cost	0.0	0.0	$ 0.0
Interest cost	0.4	0.3	0.5
Actuarial (gain) loss	(2.7)	(0.6)
Benefits paid	(1.2)	(1.2)
Exchange rate changes	0.0	0.0
Plan amendment	0.0	0.0
Ending benefit obligation	11.4	14.9	16.4
Change in Plan Assets:
Beginning fair value	14.3	13.7
Actual return on plan assets	(2.0)	1.6
Company contributions	0.0	0.2
Benefits paid	(1.2)	(1.2)
Exchange rate changes	0.0	0.0
Ending fair value	11.1	14.3	13.7
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	0.0	0.0
Liability, Defined Benefit Plan, Noncurrent	(0.3)	(0.6)
Net amount recognized in the Consolidated Balance Sheets	(0.3)	(0.6)
Amounts recognized in Accumulated other comprehensive loss:
Net actuarial (loss) gain	(7.5)	(7.8)
Net amount recognized in accumulated other comprehensive loss	(7.5)	(7.8)	(9.6)
Net gains occurring during the year	0.2	(1.3)
United Kingdom | Pension plans
Change in Benefit Obligation:
Beginning benefit obligation	63.5	69.0
Service cost	0.0	0.0	0.0
Interest cost	1.0	1.0	1.1
Actuarial (gain) loss	(18.9)	(4.4)
Benefits paid	(3.0)	(2.4)
Exchange rate changes	(6.4)	0.3
Plan amendment	0.0	0.0
Ending benefit obligation	36.2	63.5	69.0
Change in Plan Assets:
Beginning fair value	72.5	67.1
Actual return on plan assets	(26.2)	5.6
Company contributions	1.8	2.0
Benefits paid	(3.0)	(2.4)
Exchange rate changes	(7.2)	0.2
Ending fair value	37.9	72.5	67.1
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	0.0	0.0
Liability, Defined Benefit Plan, Noncurrent	0.0	0.0
Assets for Plan Benefits, Defined Benefit Plan	1.7	9.0
Net amount recognized in the Consolidated Balance Sheets	1.7	9.0
Amounts recognized in Accumulated other comprehensive loss:
Net actuarial (loss) gain	(8.4)	0.8
Net amount recognized in accumulated other comprehensive loss	(8.4)	0.8	(7.4)
Net gains occurring during the year	9.1	(8.7)
Central America | Post-retirement plans
Change in Benefit Obligation:
Beginning benefit obligation	66.9	68.0
Service cost	5.7	6.0	6.3
Interest cost	3.9	4.0	4.2
Actuarial (gain) loss	(3.7)	(6.6)
Benefits paid	(6.1)	(4.6)
Exchange rate changes	0.0	0.1
Plan amendment	0.0	0.0
Ending benefit obligation	66.7	66.9	68.0
Change in Plan Assets:
Beginning fair value	0.0	0.0
Actual return on plan assets	0.0	0.0
Company contributions	6.1	4.6
Benefits paid	(6.1)	(4.6)
Exchange rate changes	0.0	0.0
Ending fair value	0.0	0.0	0.0
Amounts recognized in the Consolidated Balance Sheets:
Accounts payable and accrued expenses (current liability)	(10.2)	(8.4)
Liability, Defined Benefit Plan, Noncurrent	(56.5)	(58.5)
Net amount recognized in the Consolidated Balance Sheets	(66.7)	(66.9)
Amounts recognized in Accumulated other comprehensive loss:
Net actuarial (loss) gain	2.8	(1.0)
Net amount recognized in accumulated other comprehensive loss	2.8	(1.0)	$ (7.5)
Net gains occurring during the year	$ (3.7)	$ (6.6)