Retirement Plans (Schedule Of Weighted-Average Assumptions Used To Determine Projected Benefit Obligation) (Details)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets	8.25%	8.25%	8.25%
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.30%	5.93%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.40%	5.15%