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MARKETABLE SECURITIES - Marketable Securities, Other Disclosure Items (Details)
 12 Months Ended
Dec. 27, 2013
Variable-rate demand notes
  
Available-for-sale Securities, Other Disclosure Items [Abstract]  
Available-for-sale securities, settlement period (less than) 7 days
Variable-rate demand notes | Minimum
  
Available-for-sale Securities, Other Disclosure Items [Abstract]  
Available-for-sale securities due in one year or less, contractual term 2 years
Variable-rate demand notes | Maximum
  
Available-for-sale Securities, Other Disclosure Items [Abstract]  
Available-for-sale securities due in one year or less, contractual term 19 years
Certificates of deposit | Minimum
  
Available-for-sale Securities, Other Disclosure Items [Abstract]  
Available-for-sale securities due after one year, maturity term 1 year
Certificates of deposit | Maximum
  
Available-for-sale Securities, Other Disclosure Items [Abstract]  
Available-for-sale securities due after one year, maturity term 2 years