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Multiemployer Pension And Postretirement Plans (Narrative) (Details)
 12 Months Ended
Jan. 03, 2015
Minimum [Member]  
Multiemployer Plans [Line Items]  
Red zone multiemployer plans funded percentage 0.00%k_RedZoneMultiemployerPlansFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Yellow zone multiemployer plans funded percentage 65.00%k_YellowZoneMultiemployerPlansFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Green zone multiemployer plan funded percentage 80.00%k_GreenZoneMultiemployerPlanFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]  
Multiemployer Plans [Line Items]  
Red zone multiemployer plans funded percentage 65.00%k_RedZoneMultiemployerPlansFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Yellow zone multiemployer plans funded percentage 80.00%k_YellowZoneMultiemployerPlansFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Green zone multiemployer plan funded percentage 100.00%k_GreenZoneMultiemployerPlanFundedPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember