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Pension Plans - Summary of Weighted Average Assumptions Used to Determine Projected Benefit Obligation (Detail)
Dec. 29, 2018
Dec. 30, 2017
Defined Benefit Plan Disclosure [Line Items]    
Rate of compensation increase 3.40% 3.40%
Pension Plan    
Defined Benefit Plan Disclosure [Line Items]    
Discount rate 4.40% 3.70%