Loss Contingency, Estimate of Possible Loss, Area of Land

No definition available.

Name:	dar_LossContingencyEstimateofPossibleLossAreaofLand
Namespace Prefix:	dar_
Data Type:	dtr-types:lengthItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Number of Parties

+ References

No definition available.

+ Details

Name:	dar_LossContingencyNumberofParties
Namespace Prefix:	dar_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of Contaminants

+ References

No definition available.

+ Details

Name:	dar_NumberofContaminants
Namespace Prefix:	dar_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

Name:	us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying amount due after one year of the balance sheet date (or one operating cycle, if longer) of amount due in settlement of a claim for reimbursement from an insurance company when the Company has suffered a loss covered under an insurance policy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_InsuranceSettlementsReceivableNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss contingency liability.

+ References

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248

+ Details

Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=dar_InsuranceEnvironmentalAndLitigationMattersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=dar_PlantOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=dar_PlantTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Contingencies (Details) $ in Millions		1 Months Ended		12 Months Ended
Contingencies (Details) $ in Millions	Jun. 30, 2018 Party	Nov. 30, 2019 USD ($)	Mar. 31, 2016 Party mi	Jan. 01, 2022 USD ($) contaminant	Jan. 02, 2021 USD ($)
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss, Area of Land \| mi			8.3
Loss Contingency, Estimate of Possible Loss				$ 1,380.0
Loss Contingency, Number of Parties \| Party	100		100
Number of Contaminants \| contaminant				8
Gain (Loss) Related to Litigation Settlement		$ 0.6
Insurance Environmental and Litigation Matters [Member]
Loss Contingencies [Line Items]
Reserves for insurance, environmental and litigation contingencies				$ 78.4	$ 66.2
Insurance Settlements Receivable, Noncurrent				31.8	$ 27.0
Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss				$ 165.0
Loss Contingency, Number of Parties \| Party	40
Plant, One [Member]
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement		0.3
Plant, Two [Member]
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement		$ 0.3