Employee Benefit Plans (Summary of Participants) (Details)	Dec. 30, 2011 employees
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Active Employees	4,993
Retirees And Beneficiaries	11,277
Other	6,295	[1]
Total	22,565
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Active Employees	2,488
Retirees And Beneficiaries	13,177
Other	40	[1]
Total	15,705

[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.