Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill at beginning of year	$ 1,241,807	$ 1,249,016
Accumulated impairment losses	(15,914)	(15,914)
Goodwill at beginning of year	1,225,893	1,233,102
Goodwill acquired during year	1,880	829
Goodwill disposed of during year	(2,894)
Foreign currency translation	76,214	(8,038)
Goodwill at end of year	1,317,007	1,241,807
Accumulated impairment losses at end of year	(15,914)	(15,914)
Goodwill at end of year	1,301,093	1,225,893
Feed Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	813,621	812,797
Accumulated impairment losses	(15,914)	(15,914)
Goodwill at beginning of year	797,707	796,883
Goodwill acquired during year	1,880	827
Goodwill disposed of during year	(2,894)
Foreign currency translation	35,560	(3)
Goodwill at end of year	848,167	813,621
Accumulated impairment losses at end of year	(15,914)	(15,914)
Goodwill at end of year	832,253	797,707
Food Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	317,008	323,385
Accumulated impairment losses	0	0
Goodwill at beginning of year	317,008	323,385
Goodwill acquired during year	0	0
Goodwill disposed of during year	0
Foreign currency translation	27,463	(6,377)
Goodwill at end of year	344,471	317,008
Accumulated impairment losses at end of year	0	0
Goodwill at end of year	344,471	317,008
Fuel [Member]
Goodwill [Roll Forward]
Goodwill disposed of during year	0
Fuel Ingredients [Member]
Goodwill [Roll Forward]
Goodwill at beginning of year	111,178	112,834
Accumulated impairment losses	0	0
Goodwill at beginning of year	111,178	112,834
Goodwill acquired during year	0	2
Foreign currency translation	13,191	(1,658)
Goodwill at end of year	124,369	111,178
Accumulated impairment losses at end of year	0	0
Goodwill at end of year	$ 124,369	$ 111,178