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RESTRICTED CASH AND INVESTMENTS (Tables) | 9 Months Ended
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Sep. 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):
| September 28, 2012 |  | December 30, 2011
Cash collateral held by insurance carriers | $ | 21.5 |  |  | $ | 21.3 |
Cash and cash equivalents held in Trust (1) | 21.7 |  |  | 19.2 |
Investments held in Trust | 80.0 |  |  | 78.0 |
Cash collateral backing letters of credit | 1.8 |  |  | 5.9 |
Other (2) | 7.1 |  |  | 6.1 |
Total restricted cash and investments | $ | 132.1 |  |  | $ | 130.5 |
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(1) | Included in this amount is $0.8 million of accrued interest at both September 28, 2012 and December 30, 2011.
(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):
| September 28, 2012
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Municipal securities | $ | 49.7 |  |  | $ | 1.2 |  |  | $ | — |  |  | $ | 50.9 |
Corporate bonds | 14.2 |  |  | 0.4 |  |  | — |  |  | 14.6 |
Asset backed bonds | 16.1 |  |  | 0.3 |  |  | — |  |  | 16.4 |
| $ | 80.0 |  |  | $ | 1.9 |  |  | $ | — |  |  | $ | 81.9 |
| 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):
| September 28, 2012
| Amortized Cost |  | Fair Value
Due in one year or less | $ | 11.3 |  |  | $ | 11.4 |
Due after one year through five years | 40.1 |  |  | 41.1 |
Due after five years through ten years | 28.6 |  |  | 29.4 |
| $ | 80.0 |  |  | $ | 81.9 |

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