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RESTRICTED CASH AND INVESTMENTS (Tables)
 12 Months Ended
Dec. 28, 2012
Restricted Cash and Investments [Abstract]  
Schedule of restricted cash and investments
The following is a summary of restricted cash and investments (in millions):
 
December 28,
2012
 
December 30,
2011
Cash collateral held by insurance carriers
$
21.5

 
$
21.3

Cash and cash equivalents held in Trust (1)
14.8

 
19.2

Investments held in Trust
91.2

 
78.0

Cash collateral backing letters of credit
1.8

 
5.9

Other (2)
7.0

 
6.1

Total restricted cash and investments
$
136.3

 
$
130.5

__________________
(1)
Included in this amount is $0.9 million and $0.8 million of accrued interest at December 28, 2012 and December 30, 2011, respectively.
(2)
Primarily consists of restricted cash in money market accounts and deferred compensation plan accounts which are comprised of mutual funds.
Schedule of held-to-maturity investments
The following tables present fair value disclosures for our held-to-maturity investments which are carried at amortized cost (in millions):
 
December 28, 2012
 
Amortized Cost
 
Gross Unrealized Gain
 
Gross Unrealized Loss
 
Fair Value
Municipal securities
$
57.3

 
$
1.0

 
$
(0.1
)
 
$
58.2

Corporate bonds
17.9

 
0.3

 
—

 
18.2

Asset backed bonds
16.0

 
0.3

 
—

 
16.3

 
$
91.2

 
$
1.6

 
$
(0.1
)
 
$
92.7


 
December 30, 2011
 
Amortized Cost
 
Gross Unrealized Gain
 
Gross Unrealized Loss
 
Fair Value
Municipal securities
$
42.8

 
$
0.8

 
$
(0.1
)
 
$
43.5

Corporate bonds
16.1

 
0.2

 
—

 
16.3

Asset backed bonds
13.6

 
0.1

 
—

 
13.7

State government and agency securities
4.5

 
—

 
—

 
4.5

United States Treasury securities
1.0

 
—

 
—

 
1.0

 
$
78.0

 
$
1.1

 
$
(0.1
)
 
$
79.0
Schedule of held-to-maturity investments by contractual maturity
The amortized cost and fair value by contractual maturity of our held-to-maturity investments are as follows (in millions):
 
December 28, 2012
 
Amortized Cost
 
Fair Value
Due in one year or less
$
11.8

 
$
11.8

Due after one year through five years
43.3

 
44.1

Due after five years through ten years
36.1

 
36.8

 
$
91.2

 
$
92.7