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Assumptions Used in Calculating Funded Status (Detail) - United Kingdom
12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Expected long-term rate of return on plan assets 4.20% 3.20% 3.47%
Discount rate 5.00% 4.00% 5.00%
Inflation 3.00% 2.90% 3.00%