XML 111 R95.htm IDEA: XBRL DOCUMENT
v3.20.4

Employee Benefit Plans Employee Benefit Plans Narrative 3 (Details) $ in Thousands | 12 Months Ended
--- | ---
Jan. 02, 2021 USD ($) plan | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($)
Employee Benefit Plans [Abstract] |  |  |
Number of Multiemployer Plans, Certified Red Zone | plan | 5 |  |
Number of Multiemployer Plans, Certified Yellow Zone | plan | 2 |  |
Multiemployer Plans, Withdrawal Obligation | $ | $ 2,700 |  |
Contributions | $ | $ 3,229 | $ 3,626 | $ 3,547

X
- Definition Employee Benefit Plans [Abstract] + References No definition available. + Details
Name: | dar_EmployeeBenefitPlansAbstract
Namespace Prefix: | dar_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Multiemployer Plans, Certified Red Zone + References No definition available. + Details
Name: | dar_NumberOfMultiemployerPlansCertifiedRedZone
Namespace Prefix: | dar_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Multiemployer Plans, Certified Yellow Zone + References No definition available. + Details
Name: | dar_NumberOfMultiemployerPlansCertifiedYellowZone
Namespace Prefix: | dar_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 9 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947 + Details
Name: | us-gaap_MultiemployerPlanEmployerContributionCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
Name: | us-gaap_MultiemployerPlansWithdrawalObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant