Debt Instrument, Redemption Period

No definition available.

Name:	dar_DebtInstrumentRedemptionPeriod
Namespace Prefix:	dar_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Default Event Percent of Principal Held in Order to Declare Notes Due and Payable Immediately

+ References

No definition available.

+ Details

Name:	dar_DefaultEventPercentOfPrincipalHeldInOrderToDeclareNotesDueAndPayableImmediately
Namespace Prefix:	dar_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Guarantee Indebtedness Amount

+ References

No definition available.

+ Details

Name:	dar_GuaranteeIndebtednessAmountRelatedtoRestrictedSubsidiary
Namespace Prefix:	dar_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: 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

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

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

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 3

-Subparagraph e

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

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

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt (Senior Notes Due 2022) (Details) (USD $)	3 Months Ended
Debt (Senior Notes Due 2022) (Details) (USD $)	Apr. 04, 2015	Jan. 02, 2014	Dec. 17, 2010
Senior Notes [Member]
Debt Instrument [Line Items]
Face amount of debt instrument		$ 500,000,000
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member]
Debt Instrument [Line Items]
Face amount of debt instrument		500,000,000
Stated interest rate		5.375%
Guarantee indebtedness amount related to restricted subsidiary		$ 50,000,000
Redemption period	90
Default event, percent of principal held in order to declare notes due and payable immediately		25.00%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| Prior to January 15, 2017 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| 2017 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	104.031%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| 2018 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	102.688%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| 2019 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	101.344%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| 2020 and thereafter [Member]
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| Prior to January 15, 2017 with Additional Restrictions [Member]
Debt Instrument [Line Items]
Redemption price, percentage	105.375%
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed	40.00%
Redemption period	60 days
Senior Notes [Member] \| Senior Notes 5.375% Due 2022 [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Redemption price, percentage of principal amount redeemed	50.00%
Redemption period	30 days
Unsecured Debt [Member] \| Senior Notes 8.5% due 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate			8.50%