Derivative Financial Instruments and Fair Value Measurements (Tables)

6 Months Ended

Jun. 27, 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]

	June 27, 2020
	Fair value
	asset (liability)		Level 1	Level 2		Level 3
	$		$	$		$
Commodity futures contracts(1)
Unrealized short-term derivative asset	134		134	—		—
Forward foreign currency contracts(2)
Not designated as hedging instruments	(70	)	—	(70	)	—

 

	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	)	—