Represents the minimum consolidated total debt ratio required to be maintained.

No definition available.

Name:	eri_DebtInstrumentConsolidatedDebtRatio
Namespace Prefix:	eri_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The issue price of the debt instrument expressed as a percentage of principal amount.

+ References

No definition available.

+ Details

Name:	eri_LongTermDebtIssuePriceAsPercentageOfPrincipalAmount
Namespace Prefix:	eri_
Data Type:	num:percentItemType
Balance Type:	na
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

Long-Term Debt (Details 2) (MTR Gaming, Senior Secured Second Lien Notes, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Aug. 01, 2011
Debt instruments
Debt issued			$ 565.0us-gaap_DebtInstrumentFaceAmount
Interest rate (as a percent)	11.50%	11.50%
Issue price as percentage of principal amount			97.00%
Prior to August 1, 2015
Debt instruments
Redemption price (as a percent)	100.00%
Year beginning August 1, 2015
Debt instruments
Redemption price (as a percent)	106.00%
Year beginning August 1, 2016
Debt instruments
Redemption price (as a percent)	103.00%
Year beginning August 1, 2017 and thereafter
Debt instruments
Redemption price (as a percent)	100.00%
Minimum
Debt instruments
Consolidated total debt ratio	4.0