| Fair value of financial assets and liabilities |
The fair value of financial assets and liabilities was determined using the following levels of inputs as of June 28, 2014 and December 28, 2013: | | | | | | | | | | | | | | | | | | Fair Value Measurements as of June 28, 2014: | | Total | | Level 1 | | Level 2 | | Level 3 | | (In thousands) | Assets | | Cash equivalents: | | | | | | | | Money market funds | $ | 357,616 |
| | $ | 357,616 |
| | $ | — |
| | $ | — |
| Short-term investments: |
| | | | | | | Corporate debt securities | 36,625 |
| | — |
| | 36,625 |
| | — |
| Bank certificates of deposit | 24,259 |
| | — |
| | 24,259 |
| | — |
| United States Treasury securities | 19,310 |
| | 19,310 |
| | — |
| | — |
| United States government agency securities | 11,361 |
| | 11,361 |
| | — |
| | — |
| Commercial paper | 1,995 |
| | — |
| | 1,995 |
| | — |
| Marketable equity securities | 4,360 |
| | 4,360 |
| | — |
| | — |
| Trading securities held in Non-Qualified Deferred Compensation, or NQDC, trust | 25,070 |
| | 25,070 |
| | — |
| | — |
| 2015 Notes Hedges | 455,844 |
| | — |
| | 455,844 |
| | — |
| Foreign currency exchange contracts | 471 |
| | — |
| | 471 |
| | — |
| Total Assets | $ | 936,911 |
| | $ | 417,717 |
| | $ | 519,194 |
| | $ | — |
| | | | | | | | | | Total | | Level 1 | | Level 2 | | Level 3 | | (In thousands) | Liabilities | | Acquisition-related contingent consideration | $ | 1,850 |
| | $ | — |
| | $ | — |
| | $ | 1,850 |
| 2015 Notes Embedded Conversion Derivative | 455,844 |
| | — |
| | 455,844 |
| | — |
| Total Liabilities | $ | 457,694 |
| | $ | — |
| | $ | 455,844 |
| | $ | 1,850 |
| | | | | | | | |
| | | | | | | | | | | | | | | | | | Fair Value Measurements as of December 28, 2013: | | Total | | Level 1 | | Level 2 | | Level 3 | | (In thousands) | Assets | | Cash equivalents: |
|
| | | | | | | Money market funds | $ | 345,872 |
| | $ | 345,872 |
| | $ | — |
| | $ | — |
| Bank certificates of deposit | 2,300 |
| | — |
| | 2,300 |
| | — |
| Short-term investments: | | | | | | | | Corporate debt securities | 37,441 |
| | — |
| | 37,441 |
| | — |
| Bank certificates of deposit | 20,308 |
| | — |
| | 20,308 |
| | — |
| United States Treasury securities | 24,246 |
| | 24,246 |
| | — |
| | — |
| United States government agency securities | 10,223 |
| | 10,223 |
| | — |
| | — |
| Commercial paper | 2,493 |
| | — |
| | 2,493 |
| | — |
| Marketable equity securities | 2,077 |
| | 2,077 |
| | — |
| | — |
| Trading securities held in NQDC trust | 23,960 |
| | 23,960 |
| | — |
| | — |
| 2015 Notes Hedges | 306,817 |
| | — |
| | 306,817 |
| | — |
| Foreign currency exchange contracts | 262 |
| | — |
| | 262 |
| | — |
| Total Assets | $ | 775,999 |
| | $ | 406,378 |
| | $ | 369,621 |
| | $ | — |
| | | | | | | | | | Total | | Level 1 | | Level 2 | | Level 3 | | (In thousands) | Liabilities | | Acquisition-related contingent consideration | $ | 4,091 |
| | $ | — |
| | $ | — |
| | $ | 4,091 |
| 2015 Notes Embedded Conversion Derivative | 306,817 |
| | — |
| | 306,817 |
| | — |
| Total Liabilities | $ | 310,908 |
| | $ | — |
| | $ | 306,817 |
| | $ | 4,091 |
|
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