Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Goodwill [Roll Forward]
Goodwill at beginning of year	$ 1,317,007	$ 1,241,807
Accumulated impairment losses	(15,914)	(15,914)
Goodwill at beginning of year	1,301,093	1,225,893
Goodwill acquired during year	29,253	1,880
Goodwill disposed of during year	(61,459)	(2,894)
Goodwill, Impairment Loss	(461)
Foreign currency translation	(39,267)	76,214
Goodwill at end of year	1,245,534	1,317,007
Accumulated impairment losses at end of year	(16,375)	(15,914)
Goodwill at end of year	1,229,159	1,301,093
Feed Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	848,167	813,621
Accumulated impairment losses	(15,914)	(15,914)
Goodwill at beginning of year	832,253	797,707
Goodwill acquired during year	27,645	1,880
Goodwill disposed of during year	(61,088)	(2,894)
Goodwill, Impairment Loss	0
Foreign currency translation	(22,758)	35,560
Goodwill at end of year	791,966	848,167
Accumulated impairment losses at end of year	(15,914)	(15,914)
Goodwill at end of year	776,052	832,253
Food Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	344,471	317,008
Accumulated impairment losses	0	0
Goodwill at beginning of year	344,471	317,008
Goodwill acquired during year	1,608	0
Goodwill disposed of during year	(371)	0
Goodwill, Impairment Loss	(461)
Foreign currency translation	(10,007)	27,463
Goodwill at end of year	335,701	344,471
Accumulated impairment losses at end of year	(461)	0
Goodwill at end of year	335,240	344,471
Fuel Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	124,369	111,178
Accumulated impairment losses	0	0
Goodwill at beginning of year	124,369	111,178
Goodwill acquired during year	0	0
Goodwill disposed of during year	0	0
Goodwill, Impairment Loss	0
Foreign currency translation	(6,502)	13,191
Goodwill at end of year	117,867	124,369
Accumulated impairment losses at end of year	0	0
Goodwill at end of year	$ 117,867	$ 124,369