Derivatives (Narrative) (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jul. 03, 2021	Apr. 03, 2021	Jun. 27, 2020	Mar. 28, 2020	Jul. 03, 2021	Jun. 27, 2020	Jan. 02, 2021
Derivative [Line Items]
Net income	$ 198,069,000	$ 153,418,000	$ 66,495,000	$ 86,091,000	$ 351,487,000	$ 152,586,000
Commodity Contract [Member]
Derivative [Line Items]
Forward purchase amount	92,000,000.0				92,000,000.0
Cash Flow Hedging [Member]
Derivative [Line Items]
Cash flow hedge gain (loss) to be reclassified within 12 months					3,100,000
Net income					0
Designated as Hedging Instrument [Member] | Other Current Assets [Member] | Foreign Exchange Contract
Derivative [Line Items]
Asset Derivatives Fair Value	9,800,000				9,800,000		$ 11,600,000
Designated as Hedging Instrument [Member] | Other Current Assets [Member] | Corn Option
Derivative [Line Items]
Asset Derivatives Fair Value	(8,200,000)				(8,200,000)		(6,800,000)
Designated as Hedging Instrument [Member] | Other Current Assets [Member] | Soybean Meal
Derivative [Line Items]
Asset Derivatives Fair Value	$ 100,000				$ 100,000		$ 400,000