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New Accounting Pronoucements (Details)	12 Months Ended
	Jan. 02, 2016 USD ($)
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of sales, modified retrospective basis effect

X

- Definition

Cost Of Sales, Modified Retrospective Basis Effect

+ References

No definition available.

+ Details

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Namespace Prefix:	dar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: