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Assumptions Used in Calculating Funded Status (Detail) - United Kingdom
12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Dec. 25, 2021
Defined Benefit Plan Disclosure [Line Items]      
Expected long-term rate of return on plan assets 3.20% 3.47% 2.03%
Discount rate 4.00% 5.00% 1.80%
Inflation 2.90% 3.00% 3.20%