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Pension, Retiree Medical and Savings Plans Pension, Retiree Medical and Savings Plans (Target Asset Allocations) (Details)
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12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
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Dec. 29, 2012
Fixed Income [Member]
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Dec. 29, 2012
U.S. Equity [Member]
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Dec. 29, 2012
International Equity [Member]
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Dec. 29, 2012
Real Estate [Member]
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Dec. 28, 2013
Scenario, Forecast [Member]
Fixed Income [Member]
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Dec. 28, 2013
Scenario, Forecast [Member]
U.S. Equity [Member]
|
Dec. 28, 2013
Scenario, Forecast [Member]
International Equity [Member]
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Dec. 28, 2013
Scenario, Forecast [Member]
Real Estate [Member]
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| Target Asset Allocation [Line Items] | ||||||||
| Target investment allocation percentage | 40.00% | 33.00% | 22.00% | 5.00% | 40.00% | 33.00% | 22.00% | 5.00% |