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Held for Sale Subsidiary - Disclosure of Long Lived Assets and Liabilities Held for Sale (Detail) - USD ($) $ in Thousands | Sep. 27, 2025 | Dec. 28, 2024
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Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] |  |  |
Total assets held for sale |  | $ 13,856 | $ 0
Disposal Group, Including Discontinued Operation, Liabilities [Abstract] |  |  |
Total liabilities held for sale |  | 4,247 | 0
Cumulative translation loss of foreign entities held for sale |  | (6,745) | $ (12,010)
Landstar Metro [Member] |  |  |
Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] |  |  |
Cash and cash equivalents |  | 798 |
Trade and other receivables |  | 9,362 |
Operating property |  | 7,601 |
Other assets |  | 4,707 |
Less: valuation allowance |  | (8,612) |
Total assets held for sale | [1] | 13,856 |
Disposal Group, Including Discontinued Operation, Liabilities [Abstract] |  |  |
Accounts payable |  | 2,132 |
Deferred income taxes and other liabilities |  | 2,115 |
Total liabilities held for sale | [1] | 4,247 |
Cumulative translation loss of foreign entities held for sale | [2] | $ 1,205 |
[1] | Assets and liabilities held for sale are separately presented on the consolidated balance sheets.
[2] | Cumulative translation loss of foreign entities held for sale is included within accumulated other comprehensive loss on the consolidated balance sheets.

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