Other Postretirement Benefits - Schedule of Assumptions Used (Details) (Other Postretirement Benefit Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate used to calculate benefit obligation	3.61%	4.22%
Estimated increase in compensation level used to calculate benefit obligation	3.50%	3.50%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate used to calculate net periodic benefit cost	4.22%	3.70%	4.66%
Estimated increase in compensation level use to calculate net periodic benefit cost	3.50%	3.50%	3.50%