Derivative Financial Instruments and Fair Value Measurements (Tables)

9 Months Ended

Sep. 26, 2020

Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	September 26, 2020
	Fair value
	asset (liability)		Level 1		Level 2		Level 3
	$		$		$		$
Commodity futures contracts(1)
Unrealized short-term derivative liability	(495	)	(495	)	—		—
Forward foreign currency contracts(2)
Not designated as hedging instruments	(670	)	—		(670	)	—
	December 28, 2019
	Fair value
	asset (liability)		Level 1		Level 2		Level 3
	$		$		$		$
Commodity futures contracts(1)
Unrealized short-term derivative asset	284		284		—		—
Forward foreign currency contracts(2)
Not designated as hedging instruments	(73	)	—		(73	)	—