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Employee Benefits - Assumptions to Determine Projected Benefit Obligation (Details)
 12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Projected benefit obligation:    
Discount rate 4.26% 4.52%
Net periodic pension cost    
Discount rate 4.52% 4.19%
Expected long-term rate of return on plan assets 7.82% 7.54%
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%