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Acquisitions (Details) | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  | 0 Months Ended | 12 Months Ended | 0 Months Ended |  |  |  | 0 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 0 Months Ended |  | 12 Months Ended | 0 Months Ended | 3 Months Ended |  |
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Jan. 03, 2015 USD ($) | Sep. 27, 2014 USD ($) | Jun. 28, 2014 USD ($) | Mar. 29, 2014 USD ($) | Dec. 28, 2013 USD ($) | Sep. 28, 2013 USD ($) | Jun. 29, 2013 USD ($) | Mar. 30, 2013 USD ($) | Jan. 03, 2015 USD ($) | Dec. 28, 2013 USD ($) | Dec. 29, 2012 USD ($) | Jan. 03, 2015 Feed Ingredients [Member] USD ($) | Dec. 28, 2013 Feed Ingredients [Member] USD ($) | Dec. 29, 2012 Feed Ingredients [Member] USD ($) | Jan. 03, 2015 Food Ingredients [Member] USD ($) | Dec. 28, 2013 Food Ingredients [Member] USD ($) | Dec. 29, 2012 Food Ingredients [Member] USD ($) | Jan. 03, 2015 Fuel Ingredients [Member] USD ($) | Dec. 28, 2013 Fuel Ingredients [Member] USD ($) | Dec. 29, 2012 Fuel Ingredients [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] USD ($) product brand continent facilities | Jan. 07, 2014 Vion Ingredients [Member] EUR (€) | Jan. 03, 2015 Vion Ingredients [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Routes [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Permits [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Patents and Other Intangibles [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Feed Ingredients [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Food Ingredients [Member] USD ($) | Jan. 07, 2014 Vion Ingredients [Member] Fuel Ingredients [Member] USD ($) | Jan. 03, 2015 Rothsay and VION Acquisitions [Member] USD ($) | Dec. 28, 2013 Rothsay and VION Acquisitions [Member] USD ($) | Oct. 28, 2013 Rothsay [Member] USD ($) facilities | Oct. 28, 2013 Rothsay [Member] CAD | Jan. 03, 2015 Rothsay [Member] USD ($) | Jan. 03, 2015 Rothsay [Member] Routes [Member] | Oct. 28, 2013 Rothsay [Member] Routes [Member] USD ($) | Jan. 03, 2015 Rothsay [Member] Permits [Member] | Oct. 28, 2013 Rothsay [Member] Permits [Member] USD ($) | Jan. 03, 2015 Rothsay [Member] Trade Names [Member] | Oct. 28, 2013 Rothsay [Member] Trade Names [Member] USD ($) | Jan. 03, 2015 Rothsay [Member] Non-compete agreements [Member] | Oct. 28, 2013 Rothsay [Member] Non-compete agreements [Member] USD ($) | Oct. 28, 2013 Rothsay [Member] Feed Ingredients [Member] USD ($) | Oct. 28, 2013 Rothsay [Member] Biodiesel [Member] facilities | Oct. 28, 2013 Rothsay [Member] Fuel Ingredients [Member] USD ($) | Oct. 01, 2014 CustomBlendersCompany [Member] USD ($) | Oct. 01, 2014 CustomBlendersCompany [Member] USD ($) | Jan. 03, 2015 Terra Holding Company [Member] USD ($) | Jun. 08, 2012 BioPur Transaction [Member] USD ($) | Dec. 28, 2013 Common Stock [Member] USD ($) | Jan. 02, 2014 Senior Notes [Member] USD ($) | Jan. 07, 2014 Trademarks and Trade Names [Member] Vion Ingredients [Member] USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Face amount of debt insturment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_SeniorNotesMember |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,200,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 1,600,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  | 612,600,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember | 640,200,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = dar_BiopurTransactionMember |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.3605 us-gaap_ForeignCurrencyExchangeRateTranslation1 / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 1.3605 us-gaap_ForeignCurrencyExchangeRateTranslation1 / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  | 0.9569 us-gaap_ForeignCurrencyExchangeRateTranslation1 / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember | 0.9569 us-gaap_ForeignCurrencyExchangeRateTranslation1 / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock |  |  |  |  |  |  |  |  | 8,612,000 us-gaap_StockIssuedDuringPeriodValueNewIssues | 843,154,000 us-gaap_StockIssuedDuringPeriodValueNewIssues | 2,969,000 us-gaap_StockIssuedDuringPeriodValueNewIssues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 874,000,000 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |
Cash consideration paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 644,500,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Receivable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,300,000 dar_BusinessCombinationContingentReceivable / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Plants |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68 dar_NumberOfPlants / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 68 dar_NumberOfPlants / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  | 5 dar_NumberOfPlants / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember | 5 dar_NumberOfPlants / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  | 1 dar_NumberOfPlants / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_StatementBusinessSegmentsAxis = dar_BiodieselMember |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,100,000,000 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  | 207,000,000 us-gaap_Revenues / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 69,943,000 us-gaap_NetIncomeLoss | 14,318,000 us-gaap_NetIncomeLoss | 32,757,000 us-gaap_NetIncomeLoss | (52,803,000)us-gaap_NetIncomeLoss | 22,493,000 us-gaap_NetIncomeLoss | 27,651,000 us-gaap_NetIncomeLoss | 26,418,000 us-gaap_NetIncomeLoss | 32,405,000 us-gaap_NetIncomeLoss | 64,215,000 us-gaap_NetIncomeLoss | 108,967,000 us-gaap_NetIncomeLoss | 130,770,000 us-gaap_NetIncomeLoss |  |  |  |  |  |  |  |  |  |  |  | 19,600,000 us-gaap_NetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  | 15,900,000 us-gaap_NetIncomeLoss / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 1,320,419,000 us-gaap_Goodwill |  |  |  | 701,637,000 us-gaap_Goodwill |  |  |  | 1,320,419,000 us-gaap_Goodwill | 701,637,000 us-gaap_Goodwill | 381,369,000 us-gaap_Goodwill | 847,594,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FeedIngredientsMember | 663,897,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FeedIngredientsMember | 380,893,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FeedIngredientsMember | 346,153,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FoodIngredientsMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FoodIngredientsMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FoodIngredientsMember | 126,672,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FuelIngredientsMember | 37,740,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FuelIngredientsMember | 476,000 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = dar_FuelIngredientsMember | 702,672,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  | 223,200,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_StatementBusinessSegmentsAxis = dar_FeedIngredientsMember | 375,600,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_StatementBusinessSegmentsAxis = dar_FoodIngredientsMember | 103,800,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_StatementBusinessSegmentsAxis = dar_FuelIngredientsMember |  |  | 262,797,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  | 224,600,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_StatementBusinessSegmentsAxis = dar_FeedIngredientsMember |  | 38,200,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_StatementBusinessSegmentsAxis = dar_FuelIngredientsMember |  | 5,400,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_CustomBlendersCompanyMember | 61,100,000 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 375,306,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  | 5,479,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = dar_CustomBlendersCompanyMember |  |  |  |  |
Business Combination, Goodwill Deductible for Tax Purposes, Percent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00%dar_BusinessCombinationGoodwillDeductibleforTaxPurposesPercent / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 33.00%dar_BusinessCombinationGoodwillDeductibleforTaxPurposesPercent / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  | 75.00%dar_BusinessCombinationGoodwillDeductibleforTaxPurposesPercent / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember | 75.00%dar_BusinessCombinationGoodwillDeductibleforTaxPurposesPercent / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember
Acquired finite-lived Intangible assets, weighted-average useful life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years | 15 years | 25 years |  |  |  |  |  |  |  |  | 21 years |  | 13 years |  | 4 years |  | 7 years |  |  |  |  | 14 years |  | 12 years | 9 years |  |  |
Business Acquisition, Transaction Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 24,400,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = dar_RothsayandVIONAcquisitionsMember | 22,200,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = dar_RothsayandVIONAcquisitionsMember | 10,800,000 us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Finance Costs, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,400,000 us-gaap_DeferredFinanceCostsGross / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  |  | 2,094,400,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 734,075,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 3,000,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,800,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = dar_CustomBlendersCompanyMember |  | 122,100,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 981,009,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  | 138,175,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,200,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dar_CustomBlendersCompanyMember | 27,700,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember | 600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = dar_BiopurTransactionMember |  |  |
Identifiable intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 190,200,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = dar_CollectionRoutesMember | 225,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = dar_PermitsMember | 16,500,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = dar_PatentsandOtherIntangiblesMember |  |  |  |  |  | 240,386,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  | 172,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = dar_CollectionRoutesMember |  | 55,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = dar_PermitsMember |  | 9,000,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember |  | 3,200,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_NoncompeteAgreementsMember |  |  |  |  | 8,600,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_CustomBlendersCompanyMember | 46,200,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember | 2,400,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = dar_BiopurTransactionMember |  |  |
Deferred tax liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 350,003,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  | 15,031,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = dar_RothsayMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,500,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember |  |  |  |
Working Capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,600,000 dar_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssetsNet / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,200,000 us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = dar_TerraHoldingCompanyMember |  |  |  |
Number of Continents in which Entity Operates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 dar_NumberofContinentsinwhichEntityOperates / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 5 dar_NumberofContinentsinwhichEntityOperates / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Brands Entity Operates |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 dar_NumberofBrandsEntityOperates / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 6 dar_NumberofBrandsEntityOperates / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number Of Products In Portfolio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 400 dar_NumberOfProductsInPortfolio / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember | 400 dar_NumberOfProductsInPortfolio / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 91,166,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = dar_VionIngredientsMember |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Business Combination, Contingent Receivable + References No definition available. + Details
Name: | dar_BusinessCombinationContingentReceivable
Namespace Prefix: | dar_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Business Combination, Goodwill Deductible for Tax Purposes, Percent + References No definition available. + Details
Name: | dar_BusinessCombinationGoodwillDeductibleforTaxPurposesPercent
Namespace Prefix: | dar_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Assets, Net + References No definition available. + Details
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