Postretirement Health Care (Narrative) (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member])	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rates at fiscal year-end	3.80%	4.60%	3.70%
Discount rate, used to determine net periodic benefit cost	3.80%