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Fair Value Measurements - Estimated Fair Values of Convertible Notes (Detail) $ in Millions | Dec. 30, 2017 USD ($)
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Estimated Fair Value Of Financial Instruments [Line Items] |
Estimated fair values of debt instruments | $ 285.1
2042 Notes |
Estimated Fair Value Of Financial Instruments [Line Items] |
Estimated fair values of debt instruments | 284.8
2043 Notes |
Estimated Fair Value Of Financial Instruments [Line Items] |
Estimated fair values of debt instruments | $ 0.3

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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References No definition available. + Details
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