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Cash Equivalents and Investments (Tables) | 12 Months Ended
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Dec. 28, 2018
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Investments |
At the End of Fiscal Year | 2017 |
(In millions) |  |
Available-for-sale securities: |  |
U.S. Treasury securities | $ | 9.6 |  |
Corporate debt securities | 96.0 |  |
Commercial paper | 100.1 |  |
Total available-for-sale securities | $ | 205.7 |  |
Reported as: |  |
Cash and cash equivalents | $ | 26.8 |  |
Short-term investments | 178.9 |  |
Total | $ | 205.7 |  |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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