Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents notes payable as of the balance sheet date.

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Fair Value Measurement (Details 1) (USD $)	Jul. 02, 2011	Jan. 01, 2011	Dec. 17, 2010
Unsecured Debt [Member] \| Darling International Senior Unsecured Restricted Notes [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Long-term Debt	$ 250,000,000	$ 250,000,000
Unsecured Debt [Member] \| Darling International Senior Unsecured Restricted Notes [Member] \| Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Fair Value of Notes	273,100,000	260,600,000
Secured Debt [Member] \| Darling International Senior Secured Revolving Loan Facility [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Long-term Debt		160,000,000
Line of Credit [Member] \| Darling International Senior Secured Revolving Loan Facility [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Long-term Debt	20,000,000	160,000,000
Line of Credit [Member] \| Darling International Senior Secured Revolving Loan Facility [Member] \| Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Fair value of revolver loan	21,700,000	160,000,000
Secured Debt [Member] \| Credit Agreement Term Loan [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Long-term Debt	60,000,000	300,000,000	300,000,000
Secured Debt [Member] \| Credit Agreement Term Loan [Member] \| Portion at Fair Value, Fair Value Disclosure [Member]
Fair Value, by Balance Sheet Grouping [Line Items]
Fair value of term loan	$ 59,400,000	$ 300,000,000