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v3.19.3.a.u2

Revenue (Details) | Dec. 28, 2019 source
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Revenue from Contract with Customer [Abstract] |
Number of Revenue Sources | 2

X
- Definition Number of Revenue Sources + References No definition available. + Details
Name: | dar_NumberofRevenueSources
Namespace Prefix: | dar_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration