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v3.20.2

Organization and Basis of Presentation - Additional Information (Details) | 3 Months Ended | 9 Months Ended |
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Sep. 30, 2020 segment | Sep. 30, 2020 u_eriRegionorSegment | Apr. 11, 2020
Organization and Basis of Presentation |  |  |
Number of geographic regions |  | 3 |
Number of reportable segments | 3 | 3 |
Percentage of furloughed employees |  |  | 90.00%

X
- Definition Organization and Basis of Presentation + References No definition available. + Details
Name: | eri_BasisOfPresentationLineItems
Namespace Prefix: | eri_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of geographic regions, where the Company's principal operating activities occur. + References No definition available. + Details
Name: | eri_NumberOfGeographicRegion
Namespace Prefix: | eri_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References No definition available. + Details
Name: | eri_PercentageOfFurloughedEmployees
Namespace Prefix: | eri_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration