Name:	eri_BasisOfPresentationLineItems
Namespace Prefix:	eri_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Carrying value of the entity's equity method investment which has been distributed.

+ References

No definition available.

+ Details

Name:	eri_EquityMethodInvestmentDistributedCarryingAmount
Namespace Prefix:	eri_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the percentage of ownership interest allowed to be acquired under merger agreement.

+ References

No definition available.

+ Details

Name:	eri_EquityPercentageAllowedToBeAcquired
Namespace Prefix:	eri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of gain (loss) on distribution of interest in equity method investment recognized in the accompanying unaudited condensed consolidated financial statements.

+ References

No definition available.

+ Details

Name:	eri_GainLossOnDistributionOfInterestInEquityMethodInvestment
Namespace Prefix:	eri_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of rooms in suite art deco-style hotel.

+ References

No definition available.

+ Details

Name:	eri_NumberOfRoomsInSuiteArtDecorStyleHotel
Namespace Prefix:	eri_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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

- Details

Name:	dei_LegalEntityAxis=eri_EldoradoCasinoShreveportJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=eri_EldoradoLimitedLiabilityCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=eri_EldoradoResortsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=eri_GalleonIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Organization and Basis of Presentation (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Sep. 01, 2014	Mar. 31, 2015 item	Sep. 18, 2014	Aug. 31, 2014
Galleon \| Silver Legacy Joint Venture
Organization and Basis of Presentation
Ownership interest (as a percent)		50.00%
Resorts
Organization and Basis of Presentation
Ownership interest (as a percent)			48.10%
Resorts \| Silver Legacy Joint Venture
Organization and Basis of Presentation
Ownership interest (as a percent)		48.10%
Resorts \| Silver Legacy Joint Venture \| Retained Interest Agreement
Organization and Basis of Presentation
Ownership percentage allowed to be acquired		1.90%
Resorts \| Tamarack
Organization and Basis of Presentation
Ownership interest (as a percent)				21.30%
Gain (loss) on distribution of interest in equity method investment	$ 0
Equity Method Investment Distributed Carrying Amount	$ 5.5
Eldorado Casino Shreveport Joint Venture
Organization and Basis of Presentation
Number of rooms in suite art deco-style hotel		403
ELLC \| Silver Legacy Joint Venture
Organization and Basis of Presentation
Ownership interest (as a percent)		50.00%