Acquisitions (Narrative) (Details)	3 Months Ended		6 Months Ended			3 Months Ended		0 Months Ended		3 Months Ended				0 Months Ended					0 Months Ended			3 Months Ended
	Jun. 28, 2014 USD ($)	Jun. 29, 2013 USD ($)	Jun. 28, 2014 USD ($)	Jun. 29, 2013 USD ($)	Dec. 28, 2013 USD ($)	Dec. 28, 2013 Common Stock [Member] USD ($)	Jan. 02, 2014 Senior Notes [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] USD ($) product brand facilities continent	Jan. 07, 2014 Vion Ingredients [Member] EUR (€)	Jun. 28, 2014 Vion Ingredients [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Feed Ingredients [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Food Ingredients [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Fuel Ingredients [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Collection Routes [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Permits [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Patents and Other Intangibles [Member] USD ($)	Jan. 07, 2014 Vion Ingredients [Member] Trademarks and Trade Names [Member] USD ($)	Jun. 28, 2014 Rothsay and VION Acquisitions [Member] USD ($)	Oct. 28, 2013 Rothsay [Member] USD ($) facilities	Oct. 28, 2013 Rothsay [Member] CAD facilities	Aug. 26, 2013 Terra Holding Company [Member] USD ($)	Jun. 28, 2014 Terra Holding Company [Member] USD ($)
Business Acquisition [Line Items]
Number of plants								67	67										5	5
Number of continents in which entity operates								5	5
Number of brands								6	6
Number of products in portfolio (over 400)								400	400
Purchase price of transaction								$ 2,200,000,000	€ 1,600,000,000										$ 612,600,000	640,200,000
Foreign currency exchange rate, translation								1.3605	1.3605										0.9569	0.9569
Stock issued, value						874,000,000
Face amount of debt instrument							500,000,000
Goodwill	1,442,299,000		1,442,299,000		701,637,000			740,573,000			241,700,000	388,100,000	110,700,000								61,100,000
Goodwill deductible for tax purposes, percent								33.00%	33.00%
Indefinite-Lived intangible assets																	32,000,000
Finite-lived Intangibles assets														209,400,000	225,600,000	14,400,000					46,200,000
Weighted average useful life of identifiable intangibles														10 years	15 years	8 years					12 years
Business combination, transaction costs																		20,100,000
Payments to acquire business, cash																				644,500,000	122,100,000	700,000
Contingent receivable																				4,300,000
Acquisition Assets Acquired and Liabilities Assumed [Abstract]
Property and equipment								1,017,112,000													27,700,000
Goodwill	1,442,299,000		1,442,299,000		701,637,000			740,573,000			241,700,000	388,100,000	110,700,000								61,100,000
Deferred tax liability								361,861,000													19,500,000
Working capital																					6,600,000
Goodwill, expected tax deductible amount																					5,200,000
Weighted average useful life of identifiable intangibles														10 years	15 years	8 years					12 years
Revenues										1,028,500,000
Net income/ (loss)	$ 32,757,000	$ 26,418,000	$ (20,046,000)	$ 58,823,000						$ 14,000,000