Stockholder's Equity/Members' Interest (Tables)

12 Months Ended

Jan. 02, 2021

Company Information

Schedule of Changes in Ownership of Summit Holdings

The following table summarizes the changes in our ownership of Summit Holdings: 

	Summit Inc. Shares (Class A)	LP Units	Total	Summit Inc. Ownership Percentage
Balance — December 29, 2018	111,658,927	3,435,518	115,094,445	97.0	%
Exchanges during period	185,861	(185,861)	—
Stock option exercises	1,065,446	—	1,065,446
Other equity transactions	399,151	—	399,151
Balance — December 28, 2019	113,309,385	3,249,657	116,559,042	97.2	%
Exchanges during period	376,487	(376,487)	—
Stock option exercises	54,517	—	54,517
Other equity transactions	650,206	—	650,206
Balance — January 2, 2021	114,390,595	2,873,170	117,263,765	97.5	%

Schedule of Changes in Each Component of Accumulated Other Comprehensive Income (Loss)

The changes in each component of accumulated other comprehensive income (loss) consisted of the following:

							Accumulated
			Foreign currency				other
	Change in		translation		Cash flow hedge		comprehensive
	retirement plans		adjustments		adjustments		income (loss)
Balance — December 29, 2018	$	3,573	$	(2,147)	$	1,255	$	2,681
Postretirement liability adjustment, net of tax	(1,402)		—		—		(1,402)
Foreign currency translation adjustment, net of tax	—		3,424		—		3,424
Income on cash flow hedges, net of tax	—		—		(1,255)		(1,255)
Balance — December 28, 2019	$	2,171	$	1,277	$	—	$	3,448
Postretirement liability adjustment, net of tax	(1,638)		—		—		(1,638)
Foreign currency translation adjustment, net of tax	—		3,393		—		3,393
Balance — January 2, 2021	$	533	$	4,670	$	—	$	5,203

Summit Materials, LLC

Company Information

Schedule of Changes in Each Component of Accumulated Other Comprehensive Income (Loss)

The changes in each component of accumulated other comprehensive income (loss) consisted of the following:

							Accumulated
			Foreign currency				other
	Change in		translation		Cash flow hedge		comprehensive
	retirement plans		adjustments		adjustments		income (loss)
Balance — December 29, 2018	$	(4,392)	$	(19,370)	$	146	$	(23,616)
Postretirement liability adjustment	(1,925)		—		—		(1,925)
Foreign currency translation adjustment	—		4,716		—		4,716
Income on cash flow hedges	—		—		(146)		(146)
Balance — December 28, 2019	$	(6,317)	$	(14,654)	$	—	$	(20,971)
Postretirement liability adjustment	(2,229)		—		—		(2,229)
Foreign currency translation adjustment	—		4,617		—		4,617
Balance — January 2, 2021	$	(8,546)	$	(10,037)	$	—	$	(18,583)