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Significant Accounting Policies (Details)
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12 Months Ended |
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Dec. 25, 2011
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Buildings, chassis and cranes [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
25 years |
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Containers [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
15 years |
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Vessels [Member] | Maximum [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
40 years |
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Vessels [Member] | Minimum [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
20 years |
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Software [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
3 years |
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Other [Member] | Maximum [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
10 years |
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Other [Member] | Minimum [Member]
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| The estimated useful lives of the Company's assets |
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| Property, Plant and Equipment, Useful Life |
3 years |