Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Comprehensive income (loss)
Net income	$ 87,651	$ 75,378	$ 245,617	$ 109,891
Other comprehensive income (loss):
Foreign currency translation adjustment	(10,247)	(4,076)	(14,113)	682
Less tax effect of other comprehensive income (loss) items	2,470	823	3,404	(176)
Other comprehensive (loss) income	(7,777)	(3,253)	(10,709)	506
Comprehensive income	79,874	72,125	234,908	110,397
Less comprehensive income attributable to Summit Holdings	1,048	1,117	3,151	1,584
Comprehensive income attributable to Summit Inc./LLC	78,826	71,008	231,757	108,813
Summit Materials, LLC
Comprehensive income (loss)
Net income	105,333	88,875	301,047	130,900
Other comprehensive income (loss):
Foreign currency translation adjustment	(10,247)	(4,076)	(14,113)	682
Other comprehensive (loss) income	(10,247)	(4,076)
Comprehensive income attributable to Summit Inc./LLC	$ 95,086	$ 84,799	$ 286,934	$ 131,582