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Assumptions Used in Calculating Funded Status (Detail) - Europe
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Defined Benefit Plan Disclosure [Line Items]      
Expected long-term rate of return on plan assets 4.07% 4.78% 5.55%
Discount rate 2.70% 3.90% 3.80%
Inflation 3.20% 3.00% 3.10%