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Pension and Postretirement Benefit Plans Narrative (Details) (USD $)
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3 Months Ended | ||||||
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Mar. 30, 2013
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Mar. 31, 2012
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Mar. 30, 2013
Pension Plans
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Mar. 31, 2012
Pension Plans
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Dec. 29, 2012
Canadian Plans
pension_plan
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Mar. 30, 2013
Canadian Plans
Special Charges Net
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Dec. 29, 2012
Other Current Assets
Canadian Plans
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| Defined Benefit Plan Disclosure [Line Items] | |||||||
| Number of liquidated pension plans | 2 | ||||||
| Current assets | $ 0 | ||||||
| Curtailment / settlement (gain) loss | 0 | 0 | 800,000 | ||||
| Contributions by employer | 1,700,000 | ||||||
| Employer contributions in 2013 | 5,300,000 | ||||||
| Reclassed out of AOCI ($0.1 million for 3 months ended March 30, 2013 and less than $0.1 million in the three months ended March 31, 2012) | $ 100,000 | $ 100,000 | |||||