Accounts payable and accrued liabilities - Narrative (Details) - USD ($) $ in Millions			6 Months Ended
	Mar. 26, 2024	Mar. 25, 2024	Jun. 30, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, payment extensions, term of original payment			1 year
Restructuring and related cost, number of positions expected to be eliminated, percent	17.00%	17.00%
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 0.6
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Severance costs			$ 5.4