Employee Benefit Plans (Assumptions) (Details)	12 Months Ended
	Dec. 28, 2016	Dec. 30, 2015	Dec. 31, 2014
Weighted-average assumptions used to determine net perioidic pension cost
Discount rate	3.62%	4.12%	4.98%
Expected long-term rate of return on assets		5.75%	6.50%
Pension Plan [Member]
Weighted-average assumptions used to determine benefit obligations
Discount rate		1.34%
Other Defined Benefit Plans [Member]
Weighted-average assumptions used to determine benefit obligations
Discount rate	3.31%	3.62%