SUMMARY OF ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Business and Credit Concentration (Details) |
6 Months Ended |
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Jun. 29, 2019
state
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Summit Materials, LLC | |
Business and Credit Concentrations | |
Number of states in which the entity operates | 23 |
Tax Receivable Agreement | Summit Holdings LP | |
Business and Credit Concentrations | |
Percentage of benefits to be paid on tax receivable agreement | 85.00% |
Percentage of the tax receivable agreement allocated to additional paid-in capital | 15.00% |