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Employee Benefits - Schedule of Assumptions to Determine Projected Benefit Obligation (Details)
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Projected benefit obligation:    
Discount rate 3.69% 4.26%
Net periodic pension cost    
Discount rate 4.26% 4.52%
Expected long-term rate of return on plan assets 8.10% 7.82%
Minimum    
Projected benefit obligation:    
Average rate of increase in future compensation levels 2.50% 2.50%
Net periodic pension cost    
Average rate of increase in future compensation levels 2.50% 2.50%
Maximum    
Projected benefit obligation:    
Average rate of increase in future compensation levels 5.50% 5.50%
Net periodic pension cost    
Average rate of increase in future compensation levels 5.50% 5.50%