Business Description	3 Months Ended
Mar. 30, 2019
Business Description and Basis of Presentation [Text Block]	The consolidated financial statements include the accounts of Landstar System, Inc. and its subsidiary, Landstar System Holdings, Inc., and reflect all adjustments (all of a normal, recurring nature) which are, in the opinion of management, necessary for a fair statement of the results for the periods presented. The preparation of the consolidated financial statements requires the use of management’s estimates. Actual results could differ from those estimates. Landstar System, Inc. and its subsidiary are herein referred to as “Landstar” or the “Company.” Significant intercompany accounts have been eliminated in consolidation.

Business Description

3 Months Ended

Mar. 30, 2019

Business Description and Basis of Presentation [Text Block]

The consolidated financial statements include the accounts of Landstar System, Inc. and its subsidiary, Landstar System Holdings, Inc., and reflect all adjustments (all of a normal, recurring nature) which are, in the opinion of management, necessary for a fair statement of the results for the periods presented. The preparation of the consolidated financial statements requires the use of management’s estimates. Actual results could differ from those estimates. Landstar System, Inc. and its subsidiary are herein referred to as “Landstar” or the “Company.” Significant intercompany accounts have been eliminated in consolidation.