Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Goodwill [Roll Forward]
Goodwill at beginning of year	$ 1,239,666	$ 1,245,534
Accumulated impairment losses	(16,375)	(16,375)
Goodwill at beginning of year	1,223,291	1,229,159
Goodwill acquired during year	14,639	487
Goodwill disposed of during year		(636)
Goodwill, Impairment Loss	31,580
Foreign currency translation	53,890	(5,719)
Goodwill at end of year	1,308,195	1,239,666
Accumulated impairment losses at end of year	(47,955)	(16,375)
Goodwill at end of year	1,260,240	1,223,291
Feed Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	793,457	791,966
Accumulated impairment losses	(15,914)	(15,914)
Goodwill at beginning of year	777,543	776,052
Goodwill acquired during year	13,925	396
Goodwill disposed of during year		(636)
Goodwill, Impairment Loss	0
Foreign currency translation	22,939	1,731
Goodwill at end of year	830,321	793,457
Accumulated impairment losses at end of year	(15,914)	(15,914)
Goodwill at end of year	814,407	777,543
Food Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	329,654	335,701
Accumulated impairment losses	(461)	(461)
Goodwill at beginning of year	329,193	335,240
Goodwill acquired during year	0	91
Goodwill disposed of during year		0
Goodwill, Impairment Loss	0
Foreign currency translation	21,642	(6,138)
Goodwill at end of year	351,296	329,654
Accumulated impairment losses at end of year	(461)	(461)
Goodwill at end of year	350,835	329,193
Fuel Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	116,555	117,867
Accumulated impairment losses	0	0
Goodwill at beginning of year	116,555	117,867
Goodwill acquired during year	714	0
Goodwill disposed of during year		0
Goodwill, Impairment Loss	31,580
Foreign currency translation	9,309	(1,312)
Goodwill at end of year	126,578	116,555
Accumulated impairment losses at end of year	(31,580)	0
Goodwill at end of year	$ 94,998	$ 116,555