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Pension Plans - Summary of Weighted-Average Assumptions Used to Determine Full-Year Pension Costs (Detail)
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Retirement Benefits [Abstract]      
Discount rate 4.20% 4.50% 4.10%
Expected return on plan assets 7.20% 7.40% 7.40%
Rate of compensation increase 3.40% 3.60% 3.60%