Retirement and Other Employee Benefits - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2023	Dec. 30, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	$ 3.1	$ 3.1
Retirement benefits	82.3	82.4
Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	16.8	18.0
Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected future benefit payments, thereafter	4.8
Pension plans | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	2.5	1.8
Pension plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan amendment due to GMP equalization	0.0	0.0
Net gains occurring during the year	(0.3)	0.2
Net periodic pension costs	0.1	0.1	$ 0.0
Expected future benefit payments, thereafter	4.1
Pension plans | United Kingdom
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan amendment due to GMP equalization	0.0	0.0
Net gains occurring during the year	2.5	9.1
Net periodic pension costs	(0.5)	(0.7)	(0.3)
Expected future benefit payments, thereafter	12.5
Post-retirement plans | Foreign Plan | Former Executives
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	1.3	1.3
Post-retirement plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan expense	1.3	1.2	1.2
Post-retirement plans | Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan amendment due to GMP equalization	(2.2)	0.0
Net gains occurring during the year	(2.5)	(3.7)
Net periodic pension costs	11.3	9.7	10.0
Expected future benefit payments, thereafter	40.6
Post-retirement plans | Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic pension costs		$ 2.2	$ 1.4
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	$ 0.8
Minimum | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	50.00%
Minimum | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	30.00%
Minimum | Post-retirement plans | Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued benefits	$ 6.6
Maximum | Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	70.00%
Maximum | Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Plan asset target allocation percentage	50.00%