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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% |  |

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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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- Definition Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(7) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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