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Revenue Recognition - Narrative (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 29, 2019 | Jun. 29, 2019 | Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Revenue, performance obligation, description of timing |  | The remaining duration of these unsatisfied performance obligations range from one month up to 60 months. |
Contract with customer, liability | $ 68.8 | $ 68.8 | $ 63.8
Contract with customer, liability, revenue recognized | $ 8.2 | $ 35.2 |
Transferred at Point in Time | Sales Revenue, Net | Ship and Bill Performance Obligations |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Concentration risk, percentage |  | 90.00% |

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