Commitments and Contingencies (Environmental Matters) (Details) (Environmental Litigation [Member])	12 Months Ended
Dec. 26, 2014 counterparty mi
Environmental Litigation [Member]
Loss Contingencies [Line Items]
Number of miles pertaining to Passaic River tidal reach required to be studied by EPA	17
Number Of Potentially Responsible Parties In Connection With Environmental Liabilities For Operations Conducted Near Passaic River	60

Number Of Potentially Responsible Parties In Connection With Environmental Liabilities For Operations Conducted Near Passaic River

No definition available.

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