Line of Credit Facility, Term

No definition available.

Name:	dar_LineOfCreditFacilityTerm
Namespace Prefix:	dar_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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

- Definition

The effective interest rate at the end of the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

Debt (Senior Secured Credit Facilities) (Details) € in Millions, CAD in Millions	3 Months Ended
	Apr. 02, 2016 USD ($)	Apr. 02, 2016 CAD	Apr. 02, 2016 EUR (€)	Jan. 02, 2016 USD ($)	Jun. 03, 2015 EUR (€)
Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit term	5 years
Secured Debt [Member] \| Senior Secured Facilities [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Line of credit facility, interest rate at period end	3.1875%	3.1875%	3.1875%
Secured Debt [Member] \| Senior Secured Facilities [Member] \| Canadian Dealer Offered Rate (CDOR) [Member] \| Canada, Dollars
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Line of credit facility, interest rate at period end	3.7144%	3.7144%	3.7144%
Secured Debt [Member] \| Senior Secured Facilities [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Line of credit facility, interest rate at period end	5.25%	5.25%	5.25%
Term Loan A Facility [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Face amount of debt instrument	$ 350,000,000
Term Loan A Facility [Member] \| Senior Secured Facilities [Member] \| Canada, Dollars
Debt Instrument [Line Items]
Line of credit outstanding	101,400,000	CAD 132.2		$ 97,100,000
Term Loan A Facility [Member] \| Senior Secured Facilities [Member] \| U.S. dollar
Debt Instrument [Line Items]
Line of credit outstanding	176,300,000
Revolving Credit Facility [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	1,000,000,000.00
Company availability under revolving loan facility	$ 944,200,000
Revolving Credit Facility [Member] \| Senior Secured Facilities [Member] \| Canadian Dealer Offered Rate (CDOR) [Member] \| Canada, Dollars
Debt Instrument [Line Items]
Line of credit outstanding \| CAD		CAD 13.0
Basis spread on variable rate	2.75%
Line of credit facility, interest rate at period end	3.7145%	3.7145%	3.7145%
Revolving Credit Facility [Member] \| Senior Secured Facilities [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Line of credit outstanding	$ 12,000,000
Letter of Credit [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	250,000,000
Line of credit outstanding	33,800,000
Swingline Sub-Facility [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	50,000,000
Term Loan B Facility [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Face amount of debt instrument	1,300,000,000
Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| U.S. dollar
Debt Instrument [Line Items]
Line of credit outstanding	$ 588,000,000
Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Line of credit facility, interest rate at period end	3.25%	3.25%	3.25%
Foreign Line of Credit [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit outstanding	$ 9,500,000
Senior Notes [Member] \| Senior Notes 4.75% Due 2022 [Member]
Debt Instrument [Line Items]
Face amount of debt instrument \| €					€ 515.0
Line of credit outstanding \| €			€ 515.0
Secured Debt [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	$ 2,650,000,000
Secured Debt [Member] \| Term Loan A Facility [Member] \| Senior Secured Facilities [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Secured Debt [Member] \| Term Loan A Facility [Member] \| Senior Secured Facilities [Member] \| Canadian Prime Rate [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Secured Debt [Member] \| Revolving Credit Facility [Member] \| Senior Secured Facilities [Member]
Debt Instrument [Line Items]
Company availability under revolving loan facility	$ 350,000,000.0
Secured Debt [Member] \| Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| U.S. dollar
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Secured Debt [Member] \| Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Euro
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Secured Debt [Member] \| Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| Euro Interbank Offered Rate [Member] \| Euro
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%
Secured Debt [Member] \| Term Loan B Facility [Member] \| Senior Secured Facilities [Member] \| Base Rate [Member] \| U.S. dollar
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Other Assets [Member] \| Accounting Standards Update 2015-03 [Member]
Debt Instrument [Line Items]
Deferred finance costs				(29,000,000)
Long Term Debt [Member] \| Accounting Standards Update 2015-03 [Member]
Debt Instrument [Line Items]
Deferred finance costs				$ 29,000,000