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Foreign Currency Contracts - Additional Information (Details) - Foreign Currency Forward Contracts $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 28, 2018 USD ($) | Sep. 28, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 29, 2017 Contract
Derivative [Line Items] |  |  |  |
Aggregate notional amount of foreign currency forward contracts | $ 30.1 | $ 30.1 | $ 17.9 |
Fair value of foreign currency forward contracts | 0.1 | 0.1 | $ 0.2 |
Number of open foreign currency contracts | Contract |  |  |  | 0
Foreign Exchange Transaction Gains (Losses) |  |  |  |
Derivative [Line Items] |  |  |  |
Net gain (loss) on foreign currency forward contracts | $ (0.2) | $ 0.7 |  |

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