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Supplemental Financial Information (Cash And Cash Equivalents) (Details) (USD $) In Millions, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Supplemental Financial Information [Abstract]
Deposits with banks as collateral for leased facilities	$ 1us-gaap_OtherShortTermInvestments	$ 1us-gaap_OtherShortTermInvestments

- Definition

Other investments not otherwise specified in the taxonomy that will be realized in a short period of time, usually less than one year or the normal operating cycle, whichever is longer.

+ References+ Details