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Inventories - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jul. 01, 2017 | Jun. 30, 2018 | Jul. 01, 2017 | Dec. 30, 2017
Geographic Valuation Methodologies Of Inventory [Line Items] |  |  |  |  |
Percentage of FIFO Inventory | 61.00% |  | 61.00% |  | 61.00%
Effect of LIFO inventory liquidation on income | $ 0 | $ 0 | $ 0 | $ 0 |
United States |  |  |  |  |
Geographic Valuation Methodologies Of Inventory [Line Items] |  |  |  |  |
Percentage of FIFO Inventory | 35.00% |  | 35.00% |  |
Percentage of LIFO Inventory | 65.00% |  | 65.00% |  |

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