Postretirement Health Care (Narrative) (Details) (Other Postretirement Benefit Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.40%	5.40%	5.70%
Discount rate, used to determine net periodic benefit cost	4.40%