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INVENTORIES (Tables)
 3 Months Ended
Mar. 30, 2024
Inventory [Line Items]  
Schedule of Components of Inventories
Inventories consisted of the following as of March 30, 2024 and December 30, 2023: 
 March 30, 2024December 30, 2023
Aggregate stockpiles$172,593 $165,272 
Finished goods85,921 43,122 
Work in process22,507 10,702 
Raw materials57,480 22,254 
Total$338,501 $241,350 
Summit Materials, LLC  
Inventory [Line Items]  
Schedule of Components of Inventories
Inventories consisted of the following as of March 30, 2024 and December 30, 2023:
March 30, 2024December 30, 2023
Aggregate stockpiles$172,593 $165,272 
Finished goods85,921 43,122 
Work in process22,507 10,702 
Raw materials57,480 22,254 
Total$338,501 $241,350