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Investments (Tables) | 9 Months Ended
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Sep. 28, 2013
Investments [Abstract] |
Schedule of Available-for-sale Securities | The following is a summary of the Company’s available-for-sale securities as of September 28, 2013:
(in millions) | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value (net carrying amount)
Corporate Bonds | $ | 21.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 21.5 |
U.S. Treasury Bills | 0.8 |  |  | — |  |  | — |  |  | 0.8 |
Total available-for-sale securities | $ | 22.3 |  |  | $ | — |  |  | $ | — |  |  | $ | 22.3 |
The following is a summary of the Company’s available-for-sale securities as of December 31, 2012:
(in millions) | Amortized cost |  | Gross unrealized gains |  | Gross unrealized losses |  | Fair value (net carrying amount)
Agency Bonds | $ | 59.2 |  |  | $ | — |  |  | $ | — |  |  | $ | 59.2 |
Corporate Bonds | 66.4 |  |  | — |  |  | — |  |  | 66.4 |
Commercial Paper | 16.0 |  |  | — |  |  | — |  |  | 16.0 |
Certificate of Deposit | 2.0 |  |  | — |  |  | — |  |  | 2.0 |
U.S. Treasury Bills | 0.8 |  |  | — |  |  | — |  |  | 0.8 |
Total available-for-sale securities | $ | 144.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 144.4 |
The net carrying value and estimated fair value of debt securities at September 28, 2013, by contractual maturity, are shown below:
(in millions) | Amortized cost |  | Fair value (net carrying amount)
Available-for-sale debt securities: |  |  |
Due in one year or less | $ | 22.3 |  |  | $ | 22.3 |
Total available-for-sale debt securities | $ | 22.3 |  |  | $ | 22.3 |
The net carrying value and estimated fair value of debt securities at December 31, 2012, by contractual maturity, are shown below:
(in millions) | Amortized cost |  | Fair value (net carrying amount)
Available-for-sale debt securities: |  |  |
Due in one year or less | $ | 92.3 |  |  | $ | 92.3 |
Due after one year through two years | 52.1 |  |  | 52.1 |
Total available-for-sale debt securities | $ | 144.4 |  |  | $ | 144.4 |

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27198-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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