Unaudited Consolidated Statements of Comprehensive Income - Summit Materials LLC - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Net income	$ 84,728	$ 192,766	$ 53,516	$ 157,966
Other comprehensive income (loss):
Foreign currency translation adjustment	3,902	(5,610)	4,105	(3,866)
Comprehensive income attributable to Summit Inc.	86,718	185,917	56,075	152,931
Summit Materials, LLC
Net income	100,090	242,101	62,879	195,714
Other comprehensive income (loss):
Foreign currency translation adjustment	3,902	(5,610)	4,105	(3,866)
Comprehensive income attributable to Summit Inc.	$ 103,992	$ 236,491	$ 66,984	$ 191,848