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Guarantor Financial Information (Condensed Consolidating Statements of Comprehensive Income) (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 04, 2015	Mar. 29, 2014
Net income/(loss)	$ 1,824us-gaap_ProfitLoss	$ (51,006)us-gaap_ProfitLoss
Other comprehensive income, net of tax:
Foreign currency translation	(98,642)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	20,615us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Pension adjustments	769us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	320us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
Total other comprehensive income/(loss), net of tax	(97,835)us-gaap_OtherComprehensiveIncomeLossNetOfTax	19,224us-gaap_OtherComprehensiveIncomeLossNetOfTax
Total comprehensive income/(loss)	(96,011)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	(31,782)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Comprehensive income/(loss) attributable to noncontrolling interests	7,042us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	868us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive income/(loss) attributable to Darling	(103,053)us-gaap_ComprehensiveIncomeNetOfTax	(32,650)us-gaap_ComprehensiveIncomeNetOfTax
Issuer [Member]
Net income/(loss)	1,824us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(51,006)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Other comprehensive income, net of tax:
Foreign currency translation	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Pension adjustments	729us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	320us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total other comprehensive income/(loss), net of tax	767us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,391)us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total comprehensive income/(loss)	2,591us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(52,397)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Comprehensive income/(loss) attributable to noncontrolling interests	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Comprehensive income/(loss) attributable to Darling	2,591us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(52,397)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Guarantors [Member]
Net income/(loss)	18,750us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	34,630us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Other comprehensive income, net of tax:
Foreign currency translation	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Pension adjustments	0us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Total other comprehensive income/(loss), net of tax	0us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Total comprehensive income/(loss)	18,750us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	34,630us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Comprehensive income/(loss) attributable to noncontrolling interests	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Comprehensive income/(loss) attributable to Darling	18,750us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	34,630us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Non-guarantors [Member]
Net income/(loss)	(1,301)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	(23,269)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Other comprehensive income, net of tax:
Foreign currency translation	(98,642)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	20,615us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Pension adjustments	40us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Total other comprehensive income/(loss), net of tax	(98,602)us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	20,615us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Total comprehensive income/(loss)	(99,903)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	(2,654)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Comprehensive income/(loss) attributable to noncontrolling interests	7,042us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	868us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Comprehensive income/(loss) attributable to Darling	(106,945)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	(3,522)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Eliminations [Member]
Net income/(loss)	(17,449)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	(11,361)us-gaap_ProfitLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Other comprehensive income, net of tax:
Foreign currency translation	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	0us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Pension adjustments	0us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	0us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Total other comprehensive income/(loss), net of tax	0us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	0us-gaap_OtherComprehensiveIncomeLossNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Total comprehensive income/(loss)	(17,449)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	(11,361)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Comprehensive income/(loss) attributable to noncontrolling interests	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	0us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Comprehensive income/(loss) attributable to Darling	(17,449)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	(11,361)us-gaap_ComprehensiveIncomeNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Natural Gas Swap [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember	(113)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember
Natural Gas Swap [Member] | Issuer [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(113)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Natural Gas Swap [Member] | Guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Natural Gas Swap [Member] | Non-guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Natural Gas Swap [Member] | Eliminations [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_NaturalGasSwapMember / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Corn Option [Member]
Other comprehensive income, net of tax:
Derivative adjustments	38us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember	(1,598)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember
Corn Option [Member] | Issuer [Member]
Other comprehensive income, net of tax:
Derivative adjustments	38us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember	(1,598)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Corn Option [Member] | Guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Corn Option [Member] | Non-guarantors [Member]
Other comprehensive income, net of tax:
Derivative adjustments	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember	0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Corn Option [Member] | Eliminations [Member]
Other comprehensive income, net of tax:
Derivative adjustments	$ 0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember	$ 0us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax / us-gaap_DerivativeInstrumentRiskAxis = dar_CornOptionMember / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember

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