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MARKETABLE SECURITIES (Tables)
 12 Months Ended
Dec. 27, 2013
Investments, Debt and Equity Securities [Abstract]  
Schedule of available-for-sale securities
The following table presents the amortized cost and fair value of our available-for-sale investments, which are carried at fair value (in millions):
 
December 27, 2013
 
Amortized Cost
 
Fair Value
Certificates of deposit
$
10.0

 
$
9.9

Variable-rate demand notes
5.8

 
5.8

Commercial paper
5.0

 
5.0

 
$
20.8

 
$
20.7
Schedule of available-for-sale securities by contractual maturity
The amortized cost and fair value by contractual maturity of our available-for-sale investments are as follows (in millions):
 
December 27, 2013
 
Amortized Cost
 
Fair Value
Due in one year or less (1)
$
14.8

 
$
14.7

Due after one year (2)
6.0

 
6.0

 
$
20.8

 
$
20.7

The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in millions):
 
December 27, 2013
 
Amortized Cost
 
Fair Value
Due in one year or less
$
10.2

 
$
10.2

Due after one year through five years
42.1

 
42.8

Due after five years through ten years
34.4

 
33.9

 
$
86.7

 
$
86.9