Employee Benefit Plans and Collective Bargaining Agreements (Actual Allocations for Defined Benefit Plans) (Details)	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Target	100.00%
Plan assets	100.00%	100.00%
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	65.00%
Plan assets	64.30%	65.50%
Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	35.00%
Plan assets	33.00%	33.30%
Cash and Other [Member]
Defined Benefit Plan Disclosure [Line Items]
Target	0.00%
Plan assets	2.70%	1.20%