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Pension and Postretirement Benefit Plans Narrative (Details) (USD $)
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3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 12 Months Ended | |||||
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 28, 2013
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Sep. 29, 2012
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Sep. 28, 2013
Pension Plans
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Sep. 29, 2012
Pension Plans
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Sep. 28, 2013
Pension Plans
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Sep. 29, 2012
Pension Plans
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Dec. 29, 2012
Canadian Plans
pension_plan
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Dec. 29, 2012
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 | 0 | 38,000 | 800,000 | ||||||
| Contributions by employer | 1,300,000 | 4,000,000 | |||||||||
| Employer contributions in 2013 | 5,300,000 | 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 | $ 300,000 | $ 100,000 | |||||||