Retirement and Other Employee Benefits - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	$ 2.4	$ 3.1
Retirement benefits	83.1	82.3
Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	16.7	16.8
Central America
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	0.2
Expected future benefit payments, thereafter	0.3
Retirement benefits	1.3
Accrued benefits	1.1
Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	0.4
Retirement benefits	1.9
Pension plans | Foreign Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net gains occurring during the year	3.5	2.5
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)	(0.3)
Net periodic pension costs	0.0	0.1	$ 0.1
Expected future benefit payments, thereafter	4.0
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	1.6	2.5
Net periodic pension costs	(0.2)	(0.5)	(0.7)
Expected future benefit payments, thereafter	12.6
Post-retirement plans | Foreign Plan | Former Executives
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Retirement benefits	1.2	1.3
Post-retirement plans | United States
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan expense	1.6	1.3	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	0.0	(2.2)
Net gains occurring during the year	0.3	(2.5)
Net periodic pension costs	11.6	11.3	9.7
Expected future benefit payments, thereafter	43.5
Post-retirement plans | Kenya
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic pension costs	1.3	1.5	2.2
Accrued benefits	2.1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	$ 0.7	$ 0.8	$ 0.9
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%
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%