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Retirement Plans (Details 8)
12 Months Ended
Dec. 29, 2012
United States Pension Plan Assets Defined Benefit | Domestic Equity Securities
 
Target allocation ranges  
Target plan asset allocations range maximum 40.00%
Target plan asset allocations range minimum 26.00%
United States Pension Plan Assets Defined Benefit | International Equity Securities
 
Target allocation ranges  
Target plan asset allocations range maximum 22.00%
Target plan asset allocations range minimum 11.00%
United States Pension Plan Assets Defined Benefit | Debt securities
 
Target allocation ranges  
Target plan asset allocations range maximum 34.00%
Target plan asset allocations range minimum 26.00%
United States Pension Plan Assets Defined Benefit | Private equity partnerships
 
Target allocation ranges  
Target plan asset allocations range maximum 11.00%
Target plan asset allocations range minimum 5.00%
United States Pension Plan Assets Defined Benefit | Real estate
 
Target allocation ranges  
Target plan asset allocations range maximum 13.00%
Target plan asset allocations range minimum 7.00%
United States Pension Plan Assets Defined Benefit | Hedge funds
 
Target allocation ranges  
Target plan asset allocations range maximum 5.00%
Target plan asset allocations range minimum 0.00%
Foreign Pension Plans Defined Benefit | Equity securities
 
Target allocation ranges  
Target plan asset allocations range maximum 70.00%
Target plan asset allocations range minimum 36.00%
Foreign Pension Plans Defined Benefit | Debt securities
 
Target allocation ranges  
Target plan asset allocations range maximum 60.00%
Target plan asset allocations range minimum 30.00%
Foreign Pension Plans Defined Benefit | Real estate
 
Target allocation ranges  
Target plan asset allocations range maximum 17.00%
Target plan asset allocations range minimum 3.00%