Debt (Debt Redemption) (Details) (Darling International Senior Unsecured Notes [Member], Unsecured Debt [Member])	9 Months Ended
	Sep. 28, 2013
Debt Instrument, Redemption [Line Items]
Redemption period	90 days
Redemption price, percentage of principal amount redeemed	35.00%
Redemption price, percentage of principal amount that remains outstanding after redemption	65.00%
Minimum [Member]
Debt Instrument, Redemption [Line Items]
Notice period	30 days
Maximum [Member]
Debt Instrument, Redemption [Line Items]
Notice period	60 days
Until December 15, 2013 [Member]
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	108.50%
Prior to December 15, 2014 [Member]
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
2014 [Member]
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	104.25%
2015 [Member]
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.125%
2016 and thereafter [Member]
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%