Employee Benefit Plans (Summary of Participants) (Details)	Dec. 28, 2012 employees
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Active Employees	5,153
Retirees And Beneficiaries	11,569
Other	5,715	[1]
Total	22,437
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Active Employees	2,176
Retirees And Beneficiaries	12,277
Other	112	[1]
Total	14,565

[1] For pension plans, the other category consists mostly of terminated but vested former employees. For post-retirement plans, the other category consists of employees on long-term disability that have not yet retired.