Derivative Financial Instruments and Fair Value Measurements (Tables)

12 Months Ended

Dec. 28, 2019

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]

	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	)	—

   

		December 29, 2018
		Fair value
		asset (liability)		Level 1		Level 2		Level 3
		$		$		$		$
Commodity futures and forward contracts(1)
	Unrealized short-term derivative asset	620		—		620		—
	Unrealized long-term derivative asset	7		—		7		—
	Unrealized short-term derivative liability	(581	)	(94	)	(487	)	—
	Unrealized long-term derivative liability	(17	)	—		(17	)	—
Forward foreign currency contracts(2)
	Not designated as hedging instruments	583		—		583		—
Inventories carried at market(3)		3,239		—		3,239		—