Acquisitions and Dispositions - Acquisitions by Region (Details) - acquisition |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2022 |
Jan. 01, 2022 |
Jan. 02, 2021 |
|
| West | |||
| Business Acquisition [Line Items] | |||
| Number of business acquisitions | 0 | 0 | 2 |
| East | |||
| Business Acquisition [Line Items] | |||
| Number of business acquisitions | 2 | 3 | 1 |
| Summit Materials, LLC | West | |||
| Business Acquisition [Line Items] | |||
| Number of business acquisitions | 0 | 0 | 2 |
| Summit Materials, LLC | East | |||
| Business Acquisition [Line Items] | |||
| Number of business acquisitions | 2 | 3 | 1 |